Node-Red 亂數折線圖 與 正弦函數（sin）、餘弦函數（cos）

 Node-Red 亂數折線圖 與 正弦函數（sin）、餘弦函數（cos）

0~100亂數產生器

High =100;

Low =0 ;

msg.payload= Math.floor(Math.random() * (1 + High - Low)) + Low ;

return msg;

正弦函數

var t=context.get("t") || 0;

t+=1;

if (t>=30) t=0;

context.set("t",t);

msg.payload=Math.sin(2*3.14*t/30)*2

msg.topic="正弦函數(SIN)"

return msg;

Node-Red 程式1

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Node-Red 程式2

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