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Divide a specific element in a matrix

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Tran Thien
Tran Thien 2019-5-8
评论： Tran Thien 2019-5-8
For example I have:
A=[1 2 3; 3 2 4; 5 4 1]
And I want it like this:
A=[1 -2 -3; -3 2 -4; -5 -4 1]
As you can see i'm trying to divide A12 A13 A21 A23 A31 A32 by -1, how can I do it?
Thank you
  2 个评论
James Tursa
James Tursa 2019-5-8
From your description, wouldn't the result be this instead?
A = [1 -2 -3; -3 2 -4; -5 -4 1]
If not, then what is the rule?

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采纳的回答

Fangjun Jiang
Fangjun Jiang 2019-5-8
A.*(2*eye(3)-1)

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