matlab ??? Error using ==> mrdivide Matrix dimensions must agree.

少了2个点，y3=exp(1/x3).*sin(x);这句也不对： clear all;clc; x1=-pi:pi/50:pi; x2=pi:pi/50:4*pi; x3=1:1/50:8; y1=x1.*cos(x1); y2=x2.*tan(1./x2).*sin(x2.^3); y3=exp(1./x3).*sin(x3);