Use js to draw pie chart

Use js to draw pie chart

A pie chart is to divide a circle into multiple sectors.

Example: http://www.zhaojz.com.cn/demo/draw8.html

The code copy is as follows:

//Pie chart

//dot dot

//r Radius

//data data (one-dimensional array)

function drawPie(dot, r, data){

if(data && data.length > 0){

var accumulationAngleOfSlope = new Number(0); //Accumulated offset angle

var total = new Number(0);

var i = 0;

for(;i<data.length;i++){ //Calculate the total of data

total += data[i];

}

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

var angle = new Number(360*data[i]/total).toFixed(3); //Convert data[i]/total to angle

//Draw a fan

drawSector(dot, r, new Number(angle), new Number(accumulationAngleOfSlope), true, Number(parseFloat(data[i]/total)*100).toFixed(3)+'%');

accumulationAngleOfSlope = accumulationAngleOfSlope+parseFloat(angle); //Accumulated offset angle

}

}

}