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);...
如何用Matlab实现三维曲线的拟合,并求出曲线的函数表达式(方程)答:使用griddata函数,可进行三维拟合,并求出任意点处的值,之前用过求电流温度和电阻率的函数拟合如下rq=griddata(i,t,r,iq,tq) 。具体过程如下:D=[[1,6,9.2];[4,12,1.5];[7,4,2.3];[10,10,2.5];[13,2,11];[16,8,9];[0,0,386.1]]D =1.0000 6.0000 9.20004....