如何使用javascript創建簡單的條形圖

Question

用戶將輸入圖形的數據。我已經使用了一條劃線，但我無法獲得正確的位置。這是我的代碼到目前爲止。由於Java環境被嵌入到網頁中，因此我無法使用條形圖庫。

// Ex5-1: Weather Data Graph 
enter code herevar canvas; 
canvas = openGraphics(); 
var sun; 
var n; 
var xposition; 
xposition = 40; 
sun = prompt("enter the sun"); 
sun = parseInt(sun, 10); 
///xposition= xposition +10; 
canvas.drawLine(40, 10, 40, 245); 
canvas.drawLine(40, 245, 390, 245); 
canvas.drawString("225 ", 10, 30); 
canvas.drawString("180 ", 10, 70); 
canvas.drawString("135 ", 10, 110); 
canvas.drawString("90 ", 10, 150); 
canvas.drawString("45 ", 10, 190); 
canvas.drawString("0 ", 10, 230); 
canvas.drawString("J ", 50, 250); 
canvas.drawString("F ", 80, 250); 
canvas.drawString("M ", 110, 250); 
canvas.drawString("A ", 140, 250); 
canvas.drawString("M ", 170, 250); 
canvas.drawString("J ", 200, 250); 
canvas.drawString("J ", 230, 250); 
canvas.drawString("A ", 260, 250); 
canvas.drawString("S ", 290, 250); 
canvas.drawString("O ", 320, 250); 
canvas.drawString("N ", 350, 250); 
canvas.drawString("D ", 380, 250); 
canvas.setStroke(30); 
canvas.drawLine(xposition, 230, xposition, sun); 
canvas.paint(); 

Answer 1

除非你正在寫此javascript條海圖作爲練習，我會用jqplot。