how to pick element by element

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Offroad Jeep
Offroad Jeep 2016-2-5
编辑： Stephen23 2016-2-5
A = magic(3)
kindly tell me how i can pick one by one element in same matrix A then do some mathematical operation if it satisfies the condition the element is replaced by new value else it remains the same for example mathematical operation is A + 10, if A+10 is >12 replace other wise remain same as initial value,then second then third..........
thanks
  2 个评论
Stephen23
Stephen23 2016-2-5
What operation do you wish to perform?
Offroad Jeep
Offroad Jeep 2016-2-5
I am trying to simulate ferromagnet in which i think this logic will be helpful in flipping the moments

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回答（1 个）

Stephen23
Stephen23 2016-2-5
编辑：Stephen23 2016-2-5
Why not just use logical indexing:
>> A = magic(3)
A =
8 1 6
3 5 7
4 9 2
>> A(A>3) = 0
A =
0 1 0
3 0 0
0 0 2

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