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- <html><head>
- <meta charset="utf-8">
- <title>contour test</title>
- <meta name="viewport" content="width=device-width, initial-scale=1.0">
- <meta name="author" content="Ben Frederickson">
- <style>
- .axis path,
- .axis line {
- fill: none;
- stroke: #666;
- }
- .axis {
- font-family: "helvetica-nueue";
- font-size: 10px;
- }
- </style>
- </head>
- <body>
- <div id="contour_graph" style="width:600px"> </div>
- <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.3/d3.min.js"></script>
- <script src="./build/contour_plot.js"></script>
- <script>
- function himmelblau(x, y) {
- return (x * x + y - 11) * ( x * x + y - 11) + (x + y * y - 7) * (x + y * y - 7);
- }
- function banana(x, y) {
- return (1 - x) * (1 - x) + 100 * (y - x * x) * ( y - x * x)
- }
- function beale(x, y) {
- return Math.pow(1.5 - x + x*y, 2) + Math.pow(2.25 - x + x*y*y, 2) +
- Math.pow(2.625 - x + x*y*y*y, 2);
- }
- function booth(x, y) {
- return Math.pow(x + 2 * y - 7, 2) + Math.pow(2 * x + y - 5, 2);
- }
- function matyas(x, y) {
- return .26 * (x * x + y * y) - .48 * x * y;
- }
- function goldsteinPrice(x, y) {
- return (1. + Math.pow(x + y + 1, 2) *
- (19 - 14*x + 3*x*x - 14 * y + 6 * x * x + 3 * y * y))
- * (30 + Math.pow(2*x-3*y, 2)*(18 - 32*x + 12 * x * x + 48*y - 36 * x * y + 27 * y* y));
- }
- var plot = contour_plot.ContourPlot()
- .f(himmelblau)
- .drawAxis(false)
- .xDomain([-6, 6])
- .yDomain([6, -6])
- .contourCount(12)
- .minima([{x : 3.584428, y : -1.848126},
- {x : -2.805118, y : 3.131312},
- {x : -3.779310, y : -3.283186},
- {x : 3, y : 2}]);
- var elements = plot(d3.select("#contour_graph"));
- </script>
- </div></div></div>
- </body></html>
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