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Replace values of matrix by multiples

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Mansour Al Asais
Mansour Al Asais 2020-4-5
回答： David Hill 2020-4-7
Write the instruction that replaces the values of A that are multiples of 10 by 999
I got this so far: A=A(mod(10,999)==0)
Im not sure of it though.
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the cyclist
the cyclist 2020-4-5
编辑：the cyclist 2020-4-5
Think of this as a two-step problem:
  1. identify the entries that are multiples of 10
  2. replace those with 999
You don't need to use the value 999 at all for the first part.
You are on the right track in using the mod function. But remember you that you are trying to find elements of A that are even multiples of 10. So, think of how to use A and 10 as your inputs.

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David Hill
David Hill 2020-4-7
A(mod(A,10)==0)=999;

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