StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics
https://doi.org/10.1109/TVCG.2020.3030352
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544 lines
15 KiB
544 lines
15 KiB
(function (global, factory) {
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typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('vega-canvas'), require('vega-dataflow'), require('vega-util'), require('vega-scale'), require('vega-statistics')) :
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typeof define === 'function' && define.amd ? define(['exports', 'vega-canvas', 'vega-dataflow', 'vega-util', 'vega-scale', 'vega-statistics'], factory) :
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(global = global || self, factory((global.vega = global.vega || {}, global.vega.transforms = {}), global.vega, global.vega, global.vega, global.vega, global.vega));
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}(this, (function (exports, vegaCanvas, vegaDataflow, vegaUtil, vegaScale, vegaStatistics) { 'use strict';
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/*
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Copyright (c) 2013, Jason Davies.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* The name Jason Davies may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL JASON DAVIES BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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// Word cloud layout by Jason Davies, https://www.jasondavies.com/wordcloud/
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// Algorithm due to Jonathan Feinberg, http://static.mrfeinberg.com/bv_ch03.pdf
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var cloudRadians = Math.PI / 180,
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cw = 1 << 11 >> 5,
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ch = 1 << 11;
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function cloud() {
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var size = [256, 256],
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text,
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font,
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fontSize,
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fontStyle,
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fontWeight,
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rotate,
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padding,
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spiral = archimedeanSpiral,
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words = [],
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random = Math.random,
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cloud = {};
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cloud.layout = function() {
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var contextAndRatio = getContext(vegaCanvas.canvas()),
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board = zeroArray((size[0] >> 5) * size[1]),
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bounds = null,
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n = words.length,
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i = -1,
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tags = [],
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data = words.map(function(d) {
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return {
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text: text(d),
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font: font(d),
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style: fontStyle(d),
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weight: fontWeight(d),
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rotate: rotate(d),
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size: ~~(fontSize(d) + 1e-14),
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padding: padding(d),
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xoff: 0,
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yoff: 0,
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x1: 0,
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y1: 0,
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x0: 0,
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y0: 0,
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hasText: false,
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sprite: null,
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datum: d
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};
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}).sort(function(a, b) { return b.size - a.size; });
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while (++i < n) {
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var d = data[i];
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d.x = (size[0] * (random() + .5)) >> 1;
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d.y = (size[1] * (random() + .5)) >> 1;
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cloudSprite(contextAndRatio, d, data, i);
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if (d.hasText && place(board, d, bounds)) {
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tags.push(d);
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if (bounds) cloudBounds(bounds, d);
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else bounds = [{x: d.x + d.x0, y: d.y + d.y0}, {x: d.x + d.x1, y: d.y + d.y1}];
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// Temporary hack
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d.x -= size[0] >> 1;
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d.y -= size[1] >> 1;
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}
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}
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return tags;
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};
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function getContext(canvas) {
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canvas.width = canvas.height = 1;
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var ratio = Math.sqrt(canvas.getContext("2d").getImageData(0, 0, 1, 1).data.length >> 2);
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canvas.width = (cw << 5) / ratio;
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canvas.height = ch / ratio;
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var context = canvas.getContext("2d");
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context.fillStyle = context.strokeStyle = "red";
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context.textAlign = "center";
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return {context: context, ratio: ratio};
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}
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function place(board, tag, bounds) {
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var startX = tag.x,
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startY = tag.y,
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maxDelta = Math.sqrt(size[0] * size[0] + size[1] * size[1]),
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s = spiral(size),
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dt = random() < .5 ? 1 : -1,
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t = -dt,
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dxdy,
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dx,
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dy;
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while (dxdy = s(t += dt)) {
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dx = ~~dxdy[0];
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dy = ~~dxdy[1];
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if (Math.min(Math.abs(dx), Math.abs(dy)) >= maxDelta) break;
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tag.x = startX + dx;
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tag.y = startY + dy;
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if (tag.x + tag.x0 < 0 || tag.y + tag.y0 < 0 ||
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tag.x + tag.x1 > size[0] || tag.y + tag.y1 > size[1]) continue;
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// TODO only check for collisions within current bounds.
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if (!bounds || !cloudCollide(tag, board, size[0])) {
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if (!bounds || collideRects(tag, bounds)) {
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var sprite = tag.sprite,
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w = tag.width >> 5,
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sw = size[0] >> 5,
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lx = tag.x - (w << 4),
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sx = lx & 0x7f,
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msx = 32 - sx,
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h = tag.y1 - tag.y0,
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x = (tag.y + tag.y0) * sw + (lx >> 5),
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last;
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for (var j = 0; j < h; j++) {
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last = 0;
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for (var i = 0; i <= w; i++) {
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board[x + i] |= (last << msx) | (i < w ? (last = sprite[j * w + i]) >>> sx : 0);
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}
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x += sw;
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}
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tag.sprite = null;
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return true;
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}
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}
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}
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return false;
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}
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cloud.words = function(_) {
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if (arguments.length) {
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words = _;
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return cloud;
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} else {
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return words;
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}
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};
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cloud.size = function(_) {
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if (arguments.length) {
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size = [+_[0], +_[1]];
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return cloud;
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} else {
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return size;
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}
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};
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cloud.font = function(_) {
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if (arguments.length) {
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font = functor(_);
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return cloud;
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} else {
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return font;
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}
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};
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cloud.fontStyle = function(_) {
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if (arguments.length) {
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fontStyle = functor(_);
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return cloud;
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} else {
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return fontStyle;
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}
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};
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cloud.fontWeight = function(_) {
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if (arguments.length) {
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fontWeight = functor(_);
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return cloud;
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} else {
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return fontWeight;
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}
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};
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cloud.rotate = function(_) {
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if (arguments.length) {
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rotate = functor(_);
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return cloud;
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} else {
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return rotate;
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}
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};
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cloud.text = function(_) {
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if (arguments.length) {
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text = functor(_);
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return cloud;
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} else {
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return text;
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}
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};
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cloud.spiral = function(_) {
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if (arguments.length) {
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spiral = spirals[_] || _;
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return cloud;
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} else {
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return spiral;
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}
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};
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cloud.fontSize = function(_) {
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if (arguments.length) {
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fontSize = functor(_);
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return cloud;
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} else {
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return fontSize;
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}
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};
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cloud.padding = function(_) {
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if (arguments.length) {
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padding = functor(_);
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return cloud;
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} else {
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return padding;
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}
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};
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cloud.random = function(_) {
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if (arguments.length) {
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random = _;
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return cloud;
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} else {
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return random;
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}
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};
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return cloud;
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}
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// Fetches a monochrome sprite bitmap for the specified text.
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// Load in batches for speed.
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function cloudSprite(contextAndRatio, d, data, di) {
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if (d.sprite) return;
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var c = contextAndRatio.context,
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ratio = contextAndRatio.ratio;
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c.clearRect(0, 0, (cw << 5) / ratio, ch / ratio);
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var x = 0,
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y = 0,
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maxh = 0,
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n = data.length,
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w, w32, h, i, j;
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--di;
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while (++di < n) {
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d = data[di];
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c.save();
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c.font = d.style + " " + d.weight + " " + ~~((d.size + 1) / ratio) + "px " + d.font;
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w = c.measureText(d.text + "m").width * ratio;
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h = d.size << 1;
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if (d.rotate) {
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var sr = Math.sin(d.rotate * cloudRadians),
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cr = Math.cos(d.rotate * cloudRadians),
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wcr = w * cr,
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wsr = w * sr,
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hcr = h * cr,
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hsr = h * sr;
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w = (Math.max(Math.abs(wcr + hsr), Math.abs(wcr - hsr)) + 0x1f) >> 5 << 5;
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h = ~~Math.max(Math.abs(wsr + hcr), Math.abs(wsr - hcr));
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} else {
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w = (w + 0x1f) >> 5 << 5;
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}
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if (h > maxh) maxh = h;
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if (x + w >= (cw << 5)) {
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x = 0;
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y += maxh;
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maxh = 0;
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}
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if (y + h >= ch) break;
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c.translate((x + (w >> 1)) / ratio, (y + (h >> 1)) / ratio);
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if (d.rotate) c.rotate(d.rotate * cloudRadians);
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c.fillText(d.text, 0, 0);
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if (d.padding) {
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c.lineWidth = 2 * d.padding;
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c.strokeText(d.text, 0, 0);
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}
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c.restore();
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d.width = w;
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d.height = h;
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d.xoff = x;
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d.yoff = y;
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d.x1 = w >> 1;
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d.y1 = h >> 1;
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d.x0 = -d.x1;
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d.y0 = -d.y1;
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d.hasText = true;
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x += w;
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}
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var pixels = c.getImageData(0, 0, (cw << 5) / ratio, ch / ratio).data,
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sprite = [];
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while (--di >= 0) {
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d = data[di];
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if (!d.hasText) continue;
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w = d.width;
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w32 = w >> 5;
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h = d.y1 - d.y0;
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// Zero the buffer
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for (i = 0; i < h * w32; i++) sprite[i] = 0;
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x = d.xoff;
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if (x == null) return;
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y = d.yoff;
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var seen = 0,
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seenRow = -1;
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for (j = 0; j < h; j++) {
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for (i = 0; i < w; i++) {
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var k = w32 * j + (i >> 5),
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m = pixels[((y + j) * (cw << 5) + (x + i)) << 2] ? 1 << (31 - (i % 32)) : 0;
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sprite[k] |= m;
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seen |= m;
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}
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if (seen) seenRow = j;
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else {
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d.y0++;
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h--;
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j--;
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y++;
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}
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}
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d.y1 = d.y0 + seenRow;
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d.sprite = sprite.slice(0, (d.y1 - d.y0) * w32);
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}
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}
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// Use mask-based collision detection.
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function cloudCollide(tag, board, sw) {
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sw >>= 5;
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var sprite = tag.sprite,
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w = tag.width >> 5,
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lx = tag.x - (w << 4),
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sx = lx & 0x7f,
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msx = 32 - sx,
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h = tag.y1 - tag.y0,
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x = (tag.y + tag.y0) * sw + (lx >> 5),
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last;
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for (var j = 0; j < h; j++) {
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last = 0;
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for (var i = 0; i <= w; i++) {
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if (((last << msx) | (i < w ? (last = sprite[j * w + i]) >>> sx : 0))
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& board[x + i]) return true;
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}
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x += sw;
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}
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return false;
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}
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function cloudBounds(bounds, d) {
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var b0 = bounds[0],
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b1 = bounds[1];
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if (d.x + d.x0 < b0.x) b0.x = d.x + d.x0;
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if (d.y + d.y0 < b0.y) b0.y = d.y + d.y0;
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if (d.x + d.x1 > b1.x) b1.x = d.x + d.x1;
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if (d.y + d.y1 > b1.y) b1.y = d.y + d.y1;
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}
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function collideRects(a, b) {
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return a.x + a.x1 > b[0].x && a.x + a.x0 < b[1].x && a.y + a.y1 > b[0].y && a.y + a.y0 < b[1].y;
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}
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function archimedeanSpiral(size) {
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var e = size[0] / size[1];
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return function(t) {
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return [e * (t *= .1) * Math.cos(t), t * Math.sin(t)];
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};
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}
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function rectangularSpiral(size) {
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var dy = 4,
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dx = dy * size[0] / size[1],
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x = 0,
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y = 0;
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return function(t) {
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var sign = t < 0 ? -1 : 1;
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// See triangular numbers: T_n = n * (n + 1) / 2.
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switch ((Math.sqrt(1 + 4 * sign * t) - sign) & 3) {
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case 0: x += dx; break;
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case 1: y += dy; break;
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case 2: x -= dx; break;
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default: y -= dy; break;
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}
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return [x, y];
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};
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}
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// TODO reuse arrays?
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function zeroArray(n) {
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var a = [],
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i = -1;
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while (++i < n) a[i] = 0;
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return a;
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}
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function functor(d) {
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return typeof d === "function" ? d : function() { return d; };
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}
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var spirals = {
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archimedean: archimedeanSpiral,
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rectangular: rectangularSpiral
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};
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var Output = ['x', 'y', 'font', 'fontSize', 'fontStyle', 'fontWeight', 'angle'];
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var Params = ['text', 'font', 'rotate', 'fontSize', 'fontStyle', 'fontWeight'];
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function Wordcloud(params) {
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vegaDataflow.Transform.call(this, cloud(), params);
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}
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Wordcloud.Definition = {
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"type": "Wordcloud",
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"metadata": {"modifies": true},
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"params": [
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{ "name": "size", "type": "number", "array": true, "length": 2 },
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{ "name": "font", "type": "string", "expr": true, "default": "sans-serif" },
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{ "name": "fontStyle", "type": "string", "expr": true, "default": "normal" },
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{ "name": "fontWeight", "type": "string", "expr": true, "default": "normal" },
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{ "name": "fontSize", "type": "number", "expr": true, "default": 14 },
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{ "name": "fontSizeRange", "type": "number", "array": "nullable", "default": [10, 50] },
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{ "name": "rotate", "type": "number", "expr": true, "default": 0 },
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{ "name": "text", "type": "field" },
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{ "name": "spiral", "type": "string", "values": ["archimedean", "rectangular"] },
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{ "name": "padding", "type": "number", "expr": true },
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{ "name": "as", "type": "string", "array": true, "length": 7, "default": Output }
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]
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};
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var prototype = vegaUtil.inherits(Wordcloud, vegaDataflow.Transform);
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prototype.transform = function(_, pulse) {
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if (_.size && !(_.size[0] && _.size[1])) {
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vegaUtil.error('Wordcloud size dimensions must be non-zero.');
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}
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function modp(param) {
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var p = _[param];
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return vegaUtil.isFunction(p) && pulse.modified(p.fields);
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}
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var mod = _.modified();
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if (!(mod || pulse.changed(pulse.ADD_REM) || Params.some(modp))) return;
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var data = pulse.materialize(pulse.SOURCE).source,
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layout = this.value,
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as = _.as || Output,
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fontSize = _.fontSize || 14,
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range;
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vegaUtil.isFunction(fontSize)
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? (range = _.fontSizeRange)
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: (fontSize = vegaUtil.constant(fontSize));
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// create font size scaling function as needed
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if (range) {
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var fsize = fontSize,
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sizeScale = vegaScale.scale('sqrt')()
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.domain(vegaUtil.extent(data, fsize))
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.range(range);
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fontSize = function(x) { return sizeScale(fsize(x)); };
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}
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data.forEach(function(t) {
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t[as[0]] = NaN;
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t[as[1]] = NaN;
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t[as[3]] = 0;
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});
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// configure layout
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var words = layout
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.words(data)
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.text(_.text)
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.size(_.size || [500, 500])
|
|
.padding(_.padding || 1)
|
|
.spiral(_.spiral || 'archimedean')
|
|
.rotate(_.rotate || 0)
|
|
.font(_.font || 'sans-serif')
|
|
.fontStyle(_.fontStyle || 'normal')
|
|
.fontWeight(_.fontWeight || 'normal')
|
|
.fontSize(fontSize)
|
|
.random(vegaStatistics.random)
|
|
.layout();
|
|
|
|
var size = layout.size(),
|
|
dx = size[0] >> 1,
|
|
dy = size[1] >> 1,
|
|
i = 0,
|
|
n = words.length,
|
|
w, t;
|
|
|
|
for (; i<n; ++i) {
|
|
w = words[i];
|
|
t = w.datum;
|
|
t[as[0]] = w.x + dx;
|
|
t[as[1]] = w.y + dy;
|
|
t[as[2]] = w.font;
|
|
t[as[3]] = w.size;
|
|
t[as[4]] = w.style;
|
|
t[as[5]] = w.weight;
|
|
t[as[6]] = w.rotate;
|
|
}
|
|
|
|
return pulse.reflow(mod).modifies(as);
|
|
};
|
|
|
|
exports.wordcloud = Wordcloud;
|
|
|
|
Object.defineProperty(exports, '__esModule', { value: true });
|
|
|
|
})));
|
|
|