How do I replace Matrix elements

2020 10 27
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更新时间：2020 10 27
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Given a matrix A replace elements not equal 0 and not equal 1 by 5. Use disp() function to print out the resulting array.
So far I've got
A(A~=0) = 5;
disp(A);
but do not know how to make it 0 AND 1.

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KSSV
KSSV 2020-10-27
When you use ~=0 and replace those with 5, the elements whch have 1 also will be eplaced by 5 right?
Liam Bouchereau
Liam Bouchereau 2020-10-27
Yeah so all elements that don't = 1 or 0 need to be replaced by the element 5

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Sudhakar Shinde
Sudhakar Shinde 2020-10-27
编辑：Sudhakar Shinde 2020-10-27

0 个投票

Try this:
A((A>1)|(A<0))=5

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Sudhakar Shinde
Sudhakar Shinde 2020-10-27
But here is a question why you would like to do this operation? At the last you know all the elements will be '5' in result if need to use both the conditions.
Liam Bouchereau
Liam Bouchereau 2020-10-27
Oh no, so I want to replace all elements that don't equal 1 or 0. So the array should be made up of 0's 1's and 5's like so...
A = [-1 0 4 6; 1 1 0 2; -7 0 5 0; 5 1 5 1];
would become
A = [5 0 5 5 1 1 0 5 5 0 5 0 5 1 5 1]
Sudhakar Shinde
Sudhakar Shinde 2020-10-27
Then you can simply use:
A((A>1)|(A<0))=5

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Stephen23
Stephen23 2020-10-27
编辑：Stephen23 2020-10-27

0 个投票

Use AND instead of OR:
>> A = [-1,0,4,6;1,1,0,2;-7,0,5,0;5,1,5,1]
A =
-1 0 4 6
1 1 0 2
-7 0 5 0
5 1 5 1
>> A(A~=0&A~=1) = 5
A =
5 0 5 5
1 1 0 5
5 0 5 0
5 1 5 1

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