如何用MATLAB画分段函数把下面的函数保存为Piecewise_x.m文件function F=Piecewise_x(x)F=x.^2.*(x>=0 & x<1)+cos(pi*(x-1)).*(x>=1 & x<2)+(-x.^2./(x+2)).*(x>=2 & x<=4);end
