Why does MATLAB do this?

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Robin Morgan 2020-5-27

评论： Robin Morgan 2020-5-27

I have my A matrix as-

A = [5 -3 7;1 0 -6;-4 8 9];

I want to show that

transpose(inv(A)) = inv(transpose(A))

but when i do,

transpose(inv(A)) == inv(transpose(A))

it shows as not equal, even though i know for a fact that it definitely is. Please help.

David Hill 2020-5-27

floating point error

isequal(round(transpose(inv(A)),15),round(inv(transpose(A)),15));

David Hill 2020-5-27

rounds to the fifteenth decial place

Robin Morgan 2020-5-27

Ok got it, Thank you so much David!

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