zhangqi
/
swOperation


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172
							<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>