learning_ml_python_code/get_liner_samples.html at master · tmacmilan/learning_ml_python_code · GitHub

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<!DOCTYPE html>
<html>
  <head>
<style>

	.top{margin:20px 0;}
	.top input{width:25px;height:25px;border:1px solid #fff;border-radius:4px;background:#ddd;}
	.top .i1{background:#000000;}
	.top .i2{background:#FF0000;}
	.top .i3{background:#80FF00;}
	.top .i4{background:#00FFFF;}
	.top .i5{background:#808080;}
	.top .i6{background:#FF8000;}
	.top .i7{background:#408080;}
	.top .i8{background:#8000FF;}
	.top .i9{background:#CCCC00;}


</style>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js" /> </script>

<canvas id="controlCanvas" height="519" width="1035" ></canvas>
<br>
<input id="widths"  type="text">宽</input>
<input id="heights"  type="text">高</input>
<button id="changeSize">变化大小</button>
<button id="getit">生成数据</button>
<div class="top">

<div id="color">
            请选择点的颜色：
            <input class="i1" id="c1" type="button" value="0" />
            <input class="i2" id="c2" type="button" value="1" />
            <input class="i3" id="c3" type="button" value="2" />
            <input class="i4" id="c4" type="button" value="3" />
            <input class="i5" id="c5" type="button" value="4" />
            <input class="i6" id="c6" type="button" value="5" />
            <input class="i7" id="c7" type="button" value="6" />
            <input class="i8" id="c8" type="button" value="7" />
            <input class="i9" id="c9" type="button" value="8" />

</div>

</div>

<input type="checkbox" id="add1" checked="checked">是否在坐标前加一个1</input>
<input type="checkbox" id="reg" checked="checked">输出为regression模式(y为纵坐标)</input>
<input type="checkbox" id="log">输出为logistic模式(y为分类标号)</input>
<br>
<textarea cols="100" id="result" rows="20" ></textarea>
<title></title>
  </head>
<script type="text/javascript" src="jquery-1.6.4.min.js" /> </script>
<script type="text/javascript">
var dot=new Array();
var colors=new Array("#000000","#FF0000","#80FF00","#00FFFF","#808080","#FF8000","#408080","#8000FF","#CCCC00");
var now_color=0;
$(function(){
init();
$("#changeSize").click(function(){
if ($("#heights").val()!="" && $("#widths").val()!="")
{
$("#controlCanvas").attr("height",Math.abs($("#heights").val())*20+40);
$("#controlCanvas").attr("width",Math.abs($("#widths").val())*20+40);

init();
var canvas = document.getElementById("controlCanvas");
var context = canvas.getContext("2d");
stage_info = canvas.getBoundingClientRect();

for (var i=0;i<dot.length;i++)
{

cxt=context;
cxt.fillStyle=colors[dot[i].c];
cxt.beginPath();
cxt.arc(dot[i].x,stage_info.bottom-dot[i].y-8,5,0,Math.PI*2,true);

cxt.closePath();
cxt.fill();
//alert("Demo的位置是X:"+(dot[i].x-20)/20.0+";Y:"+(dot[i].y-20)/20.0);
}
} else alert("come on!  some data is needed!!");
});
$("#c1").click(function(){now_color=$("#c1").attr("value");});
$("#c2").click(function(){now_color=$("#c2").attr("value");});
$("#c3").click(function(){now_color=$("#c3").attr("value");});
$("#c4").click(function(){now_color=$("#c4").attr("value");});
$("#c5").click(function(){now_color=$("#c5").attr("value");});
$("#c6").click(function(){now_color=$("#c6").attr("value");});
$("#c7").click(function(){now_color=$("#c7").attr("value");});
$("#c8").click(function(){now_color=$("#c8").attr("value");});
$("#c9").click(function(){now_color=$("#c9").attr("value");});


$("#getit").click(function(){
  if ($("#log").attr("checked"))
  {
	  var s="X=[\n";

	  for (var i=0;i<dot.length-1;i++)
	  {
	  s+='[';
	    if ($("#add1").attr("checked"))
		{
		 s=s+'1,';
		 }
		 s+=(dot[i].x-20)/20.0+","+(dot[i].y-20)/20.0+"],\n";
	  }
	   s+='[';
	  if ($("#add1").attr("checked"))
		 s=s+'1,';
		 s+=(dot[i].x-20)/20.0+","+(dot[i].y-20)/20.0+"]]\n\n\n";

	  s+="y=[\n"
	  for (var i=0;i<dot.length-1;i++)
	  {
		 s+="["+dot[i].c+"],\n";
	  }
		 s+="["+dot[i].c+"]]";

	  $("#result").attr("value",s);

  }
  else

  if ($("#reg").attr("checked"))
  {
	  var s="X=[\n";

	  for (var i=0;i<dot.length-1;i++)
	  {
	  s+='[';
	    if ($("#add1").attr("checked"))
		{
		 s=s+'1,';
		 }
		 s+=(dot[i].x-20)/20.0+"],\n";
	  }
	   s+='[';
	  if ($("#add1").attr("checked"))
		 s=s+'1,';
		 s+=(dot[i].x-20)/20.0+"]]\n\n\n";

	  s+="y=[\n"
	  for (var i=0;i<dot.length-1;i++)
	  {
		 s+="["+(dot[i].y-20)/20.0+"],\n";
	  }
		 s+="["+(dot[i].y-20)/20.0+"]]";

	  $("#result").attr("value",s);

  }


});
})

function init()
{

var canvas = document.getElementById("controlCanvas");
var context = canvas.getContext("2d");
var canvasWidth=$(canvas).attr("width");//获取canvas的宽度

var canvasHeight=$(canvas).attr("Height");//获取canvas的高度
var canvasWidthFloat=canvasWidth%20; //防止canvas宽度不是20的倍数，要不然绘制的坐标点会有问题
var canvasHeightFloat=canvasHeight%20; //防止canvas高度不是20的倍数，要不然绘制的坐标点会有问题
//绘制y轴平行线
canvas.onmousedown = function(event) {
            drawBegin(event);
        };

function  drawBegin(e) {

            stage_info = canvas.getBoundingClientRect();
			var X= (e.clientX-stage_info.left);
            var Y= (e.clientY-stage_info.top);
			var yy=(stage_info.bottom-e.clientY);


cxt=context;
cxt.fillStyle=colors[now_color];
cxt.beginPath();
cxt.arc(X,Y,5,0,Math.PI*2,true);
cxt.closePath();
cxt.fill();
dot[dot.length]={x:X,y:yy,c:now_color};

			// alert("Demo的位置是X:"+dot[dot.length-1].x+";Y:"+yy);
    }

for ( var x = 20; x <canvasWidth-20; x += 20) {
context.moveTo(x, canvasHeightFloat);
context.lineTo(x, canvasHeight-20);
}
//绘制x轴平行线
for ( var y = 20; y <canvasHeight-20; y += 20) {
context.moveTo(20, y+canvasHeightFloat);
context.lineTo(canvasWidth-20, y+canvasHeightFloat);
}
context.strokeStyle = "#ddd";
context.stroke();
context.beginPath();
//画横坐标
context.moveTo(20, canvasHeight-20);
context.lineTo(canvasWidth-20, canvasHeight-20);
context.moveTo(canvasWidth-35, canvasHeight-30);
context.lineTo(canvasWidth-20, canvasHeight-20);
context.lineTo(canvasWidth-35, canvasHeight-10);
//画纵坐标
context.moveTo(20, canvasHeight-20);
context.lineTo(20, canvasHeightFloat);
context.moveTo(10, canvasHeightFloat+15);
context.lineTo(20, canvasHeightFloat);
context.lineTo(30, canvasHeightFloat+15);


context.strokeStyle = "#000";
context.stroke();
var yvalue=0
var yvalueMax=parseInt((canvasHeight-20)/20)
//这样你的y坐标就不会受到canvas变法而烦恼了
for(var x=20;x<canvasHeight;x+=20)
{
if(yvalue==yvalueMax)
break;
context.fillText(yvalue++,5,canvasHeight-x+3);//让y轴的值向下移动3px，让y值显示在平行线的中间
}
//x轴坐标，这里修复了一下canvas不是20倍数以后，坐标点为移动的问题 -_-!经过测试，无论你怎么调整都没事哦
var xvalue=parseInt((canvasWidth-20)/20)-1
for(var y=20;y<canvasWidth;y+=20)
{
if(xvalue==0)
break;
context.fillText(xvalue--,canvasWidth-y-canvasWidthFloat-3,canvasHeight-5);//让x轴的值向右移动3px，让x值显示在平行线的中间
}

}


</script>

</html>