MATLAB
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MATLAB
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tic, A=rand(500); B=inv(A);
norm(A*B-eye(500)),toc
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MATLAB
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>> tic, A=rand(500); B=inv(A); norm(A*B-eye(500)), toc
ans =
1.2333e-012
Elapsed time is 1. seconds.
2
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subs()
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x
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s
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>> syms s x;f=x^5+3*x^4+4*x^3+2*x^2+3*x+6;F=subs(f,x,(s-1)/(s+1))