File:ECDF-100.png
原本檔案 （2,500 × 2,500 像素，檔案大細：139 KB ，MIME類型：image/png）
摘要
| 描述 |
English: 100 visualizations of an empirical distribution function, generated using JavaScript. The grey bars show the samples corresponding to the ECDF and the green curve is the theoretical distribution from which the samples have been drawn. |
| 日期 | |
| 來源 | 自己作品 |
| 作者 | nagualdesign |
These graphs were generated using the following HTML/JavaScript code. It uses File:ECDF-0.png—a blank graph, blue.png—a single blue pixel, and grey.png—a single grey pixel. For more information contact nagualdesign:
<!DOCTYPE html>
<html lang="en">
<head>
<script>
function gaussian() {
// Generate a random number; mean=0, standard deviation=1
return Math.sqrt(-2*Math.log(Math.random()))*Math.cos((2*Math.PI)*Math.random());
}
function run() {
// Set number of graphs, samples per graph, number of columns
var graphs=100, samples=20, columns=10, content='', s=new Array;
for (set=0; set<graphs; set++) {
// Generate a set of samples, scaled from -100 to +100
s[set]=new Array;
for (sample=0; sample<samples; sample++) s[set][sample]=Math.round(gaussian()*25);
// Sort samples into ascending order
s[set].sort(function(a, b){return a-b});
// Display blank graph
var offsetX=(set-(columns*Math.floor(set/columns)))*250, offsetY=Math.floor(set/columns)*250;
content+='<img src="ECDF-0.png" style="position:absolute; top:'+offsetY+'px; left:'+offsetX+'px; z-index:-1;">';
for (sample=0; sample<samples; sample++) {
// Step function 'tread'
content+='<img src="blue.png" width="'+(1+Math.abs(s[set][sample-1]-s[set][sample]))+'px" height="1px" style="position:absolute; top:'+(210+offsetY-((200/samples)*sample))+'px; left:'+(s[set][sample-1]+139+offsetX)+'px;">';
// Step function 'riser'
content+='<img src="blue.png" width="1px" height="'+(200/samples)+'px" style="position:absolute; top:'+(211+offsetY-((200/samples)*(sample+1)))+'px; left:'+(s[set][sample]+139+offsetX)+'px;">';
// Display samples
content+='<img src="grey.png" width="1px" height="9px" style="position:absolute; top:'+(201+offsetY)+'px; left:'+(s[set][sample]+139+offsetX)+'px;">';
}
}
document.body.innerHTML=content;
}
</script>
</head>
<body onLoad="run();">
</body>
</html>
協議
|
I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
檔案歷史
撳個日期／時間去睇響嗰個時間出現過嘅檔案。
| 日期／時間 | 縮圖 | 尺寸 | 用戶 | 註解 | |
|---|---|---|---|---|---|
| 現時 | 2018年2月6號 (二) 05:11 |  | 2,500 × 2,500（139 KB） | Nagualdesign | Improved antialiasing. |
| 2018年1月30號 (二) 13:46 |  | 2,500 × 2,500（143 KB） | Nagualdesign | Updated. | |
| 2018年1月30號 (二) 11:48 |  | 2,500 × 2,500（152 KB） | Nagualdesign | == {{int:filedesc}} == {{Information |Description={{en|1=100 visualizations of an empirical distribution function, generated using JavaScript. The grey bars show the samples corresponding to the ECDF and the green... |
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