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modify parted matrix element

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Bayan
Bayan 2012-2-15
关闭： MATLAB Answer Bot 2021-8-20
Hi i have part of specific matrix was made partition , then how we can modify all of element of this part by add or multiply or any mathematical operation??

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bym
bym 2012-2-16
x =magic(4)
x =
16 2 3 13
5 11 10 8
9 7 6 12
4 14 15 1
x(1:2,1:2)=x(1:2,1:2)-x(1:2,1:2)
x =
0 0 3 13
0 0 10 8
9 7 6 12
4 14 15 1

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