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Javascript數學函數sin與cos對比EXCEL函數
Javascript在網頁就可以執行不需要開啟Spyder sin執行 cos執行 橫軸 以上程式碼 <style>BUTTON{BORDER:GREEN 5PX SOLID;BORDER-RADIUS:30PX;}</style> <h1>Javascript在網頁就可以執行不需要開啟Spyder</h1> <button onclick="LHsin()">sin執行</button> <button onclick="LHcos()">cos執行</button> <button onclick="xLine()">橫軸</button> <canvas height="400" id="my" style="background: black;" width="1200"></canvas> <script> var c = document.getElementById("my"); var cty = c.getContext("2d"); var g = 0.01;//增加一個廣域變數,用在下面的Math.sin(g*x); var h = 195; function LHsin() { var x = 0; var y = 200; cty.beginPath(); cty.lineWidth = 5; cty.moveTo(x,y); while (x < 1000){ x = x + 1; y = 200 - h * Math.sin(g*x); cty.lineTo(x, y); cty.strokeStyle = "yellow"; cty.stroke(); }; } function LHcos() { var x = 0; var y = 200-h;//上面的sin是y =200這裡要改掉 cty.beginPath(); ct...
葉宗翰JavaScript物件導向方法是物件的函數
物件導向設計OOP=Object-Oriented Programming 主詞subject受詞object東方的oriental id=identity,身分證id card, division區塊,段落 .方法get()是取得對應的值,功能同字典 dict.get(s1.code)從dict字典取得索引為s1.code的值 葉宗翰以上的程式碼 <H1>物件導向設計OOP=Object-Oriented Programming</H1> 主詞subject受詞object東方的oriental <P id="cat"></P> <P id="dog"></P> <P>id=identity,身分證id card, division區塊,段落</P> <script>//Javascript註解二斜線//Python註解# dict =new Map([["2303","聯電"],["2330","台積電"],["2880","華南金"]]);//宣告配對(字典) class Stock{ //宣告類別 constructor(code, shares, price){//建構子constructor this.code = code; this.shares = shares; this.price = price;} } s1 = new Stock("2330", 100, 1000); //建構子Stock建構s1 s2 = new Stock("2880", 1000, 30); //建構子Stock建構s2 st = s1.code+' 股數 '+s1.shares.toString()+'<BR>'+s2.code.toString()+' 股數 '+s2.shares; document.getElementById('cat...
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