多维数据分类处理,计算夹角
//计算几何误差修正,与单位向量[1,1,…,1]的夹角 const EPS=0.00000001; const vectorAngle = (x) => { let mX = Math.sqrt(x.reduce((acc, n) => acc + Math.pow(n, 2), 0)); let mY = Math.sqrt(x.length); const d1=x.reduce((acc, n) => acc + n , 0) const d2=(mX * mY) if(Math.abs(d1-d2)<EPS){ return 0 } return Math.acos(d1/d2)*180/Math.PI; };
console.log(vectorAngle([2,1,1]))