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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82 lines
1.7 KiB
82 lines
1.7 KiB
4 years ago
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"use strict"
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var tape = require("tape")
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var orderSegments = require("../lib/order-segments")
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function sgn(x) {
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if(x < 0) {
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return -1
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}
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if(x > 0) {
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return 1
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}
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return 0
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}
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function compareSegments(t, a, b, s) {
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var label = " (" + a.join(")-(") + ") / (" + b.join(")-(") + ")"
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for(var flip=0; flip<2; ++flip) {
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for(var i=0; i<2; ++i) {
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for(var j=0; j<2; ++j) {
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t.equals(sgn(orderSegments(
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[a[i], a[i^1]],
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[b[j], b[j^1]])), s, "check order flip:" + flip + ",aperm:" + i + ",bperm:" + j + label)
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}
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}
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var tmp = a
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a = b
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b = tmp
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s *= -1
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}
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}
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tape("order-segments", function(t) {
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//Harder cases
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compareSegments(t,
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[[0,0], [0.5,0.5]],
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[[0,2], [2,0]],
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1)
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compareSegments(t,
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[[0,0], [0.5,0.5]],
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[[-2,0], [1,-3]],
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-1)
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//Check some easy examples
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compareSegments(t,
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[[0, 0], [1, 0]],
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[[0, 1], [1, 1]],
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1)
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compareSegments(t,
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[[0, 0], [1, 0]],
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[[1, 0], [2, 0]],
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1)
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//Create a fan of segments
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var fan = [[[0,0], [0,-1]]]
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for(var x=1; x<30; ++x) {
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var theta = (x / 30) * Math.PI
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fan.push(
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[[0,0],
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[Math.sin(theta), -Math.cos(theta)]])
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}
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fan.push([[0,0], [0, 1]])
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for(var i=0; i<fan.length; ++i) {
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compareSegments(t, fan[i], fan[i], 0)
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for(var j=i+1; j<fan.length; ++j) {
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compareSegments(t, fan[i], fan[j], 1)
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}
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}
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//Create negative fan
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var negFan = fan.map(function(seg) {
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return [seg[0], [-seg[1][0], seg[1][1]]]
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})
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for(var i=0; i<fan.length; ++i) {
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compareSegments(t, negFan[i], negFan[i], 0)
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for(var j=i+1; j<fan.length; ++j) {
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compareSegments(t, fan[i], fan[j], 1)
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}
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}
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t.end()
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})
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