请用MatLab 帮拟合出曲线方程答:30 25 20 15 10 5 3 ]; plot(x,y)a=polyfit(x,y,3);fv=polyval(a,x);figureplot(x,y,'o',x,fv)legend('原数据','拟合')fx=vpa(poly2sym(a),6)%拟合的函数 结果:fx = 826.082*x^3 - 1358.92*x^2 + 711.602*x - 24.5019 ...
matlab 极坐标曲线拟合方程怎么求?答:;R = [320,321,341,375,420,450,460,466,474,468,466,466,466,466,466,466,466,461,443,420,400,383,360,337,320];plot(theta,R,'o');将数据标准化 theta1 = (theta-mean(theta))./std(theta);p=polyfit(theta1,R,8);pval=polyval(p,theta1);hold on;plot(theta,pval);...