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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144 lines
3.4 KiB
144 lines
3.4 KiB
'use strict'
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/**
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* Test multiple points
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*/
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const random = require('gauss-random')
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var fit = require('canvas-fit')
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var mouseWheel = require('mouse-wheel')
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var mouseChange = require('mouse-change')
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var createScatter = require('./')
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var createPlot = require('gl-plot2d')
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var fps = require('fps-indicator')({
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position: 'bottom-left'
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})
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var POINT_COUNT = 1e6
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var positions = new Float32Array(2 * POINT_COUNT)
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for(var i=0; i<2*POINT_COUNT; ++i) {
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positions[i] = random()
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}
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setup({
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positions: positions,
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color: [0,0,0,.5],
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borderSize: 1,
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snapPoints: true,
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sizeMin: 10,
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sizeMax: 12,
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areaRatio: 1,
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blend: true,
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borderColor: [0, 0, 0, 1]
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})
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function setup (options) {
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var canvas = document.createElement('canvas')
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document.body.appendChild(canvas)
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window.addEventListener('resize', fit(canvas, null, +window.devicePixelRatio), false)
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var gl = canvas.getContext('webgl', {
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depth: false,
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// alpha: true,
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// premultipliedAlpha: true
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})
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var aspect = gl.drawingBufferWidth / gl.drawingBufferHeight
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var dataBox = [-10,-10/aspect,10,10/aspect]
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function makeTicks(lo, hi) {
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var result = []
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for(var i=lo; i<=hi; ++i) {
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result.push({
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x: i,
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text: i + ''
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})
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}
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return result
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}
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var plot = createPlot({
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gl: gl,
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pixelRatio: 1,
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borderLineEnable: [false,false,false,false],
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labelEnable: [false, false],
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tickEnable: [false, false],
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gridLineEnable: [false, false],
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zeroLineEnable: [false, false],
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viewBox: [0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight],
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})
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var scatter = createScatter(plot, options)
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var lastX = 0, lastY = 0
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var boxStart = [0,0]
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var boxEnd = [0,0]
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var boxEnabled = false
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mouseChange(function(buttons, x, y, mods) {
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y = window.innerHeight - y
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x *= plot.pixelRatio
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y *= plot.pixelRatio
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if(buttons & 1) {
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if(mods.shift) {
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var dataX = (x - plot.viewBox[0]) / (plot.viewBox[2]-plot.viewBox[0]) * (dataBox[2] - dataBox[0]) + dataBox[0]
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var dataY = (y - plot.viewBox[1]) / (plot.viewBox[3]-plot.viewBox[1]) * (dataBox[3] - dataBox[1]) + dataBox[1]
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if(!boxEnabled) {
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boxStart[0] = dataX
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boxStart[1] = dataY
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}
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boxEnd[0] = dataX
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boxEnd[1] = dataY
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boxEnabled = true
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} else {
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var dx = (lastX - x) * (dataBox[2] - dataBox[0]) / (plot.viewBox[2]-plot.viewBox[0])
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var dy = (lastY - y) * (dataBox[3] - dataBox[1]) / (plot.viewBox[3] - plot.viewBox[1])
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dataBox[0] += dx
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dataBox[1] += dy
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dataBox[2] += dx
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dataBox[3] += dy
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plot.setDataBox(dataBox)
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}
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} else {
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var result = plot.pick(x/plot.pixelRatio, y/plot.pixelRatio)
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}
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lastX = x
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lastY = y
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})
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mouseWheel(function(dx, dy, dz) {
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var scale = Math.exp(0.1 * dy / gl.drawingBufferHeight)
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var cx = (lastX - plot.viewBox[0]) / (plot.viewBox[2] - plot.viewBox[0]) * (dataBox[2] - dataBox[0]) + dataBox[0]
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var cy = (plot.viewBox[1] - lastY) / (plot.viewBox[3] - plot.viewBox[1]) * (dataBox[3] - dataBox[1]) + dataBox[3]
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dataBox[0] = (dataBox[0] - cx) * scale + cx
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dataBox[1] = (dataBox[1] - cy) * scale + cy
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dataBox[2] = (dataBox[2] - cx) * scale + cx
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dataBox[3] = (dataBox[3] - cy) * scale + cy
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plot.setDataBox(dataBox)
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return true
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})
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function render() {
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requestAnimationFrame(render)
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plot.draw()
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}
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render()
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return scatter
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}
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