matlab 不能运行 Function definitions are not permitted at the prompt or in scriptsfunction y=ex32n=21;x=linspace(-5,5,n)';h=(5-(-5))/(n-1);y=1./(1+x.^2);for j=2;n,y(1:n+1-j,j)=diff(y(1:n+2-j,j-1))./(x(j:n)-x(1:n+1-j));endy=y(1,:);pz=[];v=linspace
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