replace a portion of a matrix

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Mohammad Golam Kibria
I have a matrix. I need to replace value 1 with 5 of row 3 from column 2 to 4. and I need to replace value 1 with 5 of column 5 from row 2 to 4.
I =
1 1 1 1 1 0 0 0 0 0
1 1 1 1 1 0 0 0 0 0
1 1 1 1 1 0 0 0 0 0
1 1 1 1 1 0 0 0 0 0
1 1 1 1 1 0 0 0 0 0
How to do this easily?Thanks in advance.

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采纳的回答

Paulo Silva
Paulo Silva 2011-5-18
I(3,2:4)=5;
I(2:4,5)=5;

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