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Re: fast replace for matrix minor


Carl K. Woll wrote:
> Something like this?
> m=Array[Plus,{5,5}];
> Replace minor block with rows 2,3,4 and columns 4 and 5:
> m[[Range[2,4],Range[4,5]]] = {{a,b},{c,d},{e,f}};
> Now, the matrix m has had a minor block replaced with the above matrix.
> Carl Woll
> Wolfram Research

Hi Carl,
I wish I could delete my ridiculous post cause
your solution is more than 100 times faster
and simpler than mine!

Best regards,
V.Astanoff


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