How to replace all odd numbers with infinity using find()

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timetry2
timetry2 2019-10-11
评论： Adam Danz 2019-10-12
I have a code that looks like this: C = randi([100,200],1000,1000);
How would I replace all the odd numbers with infinity using the find() function. I read up on find but I am unsure how to replace just the odd numbers.
Thank you in advance

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Walter Roberson
Walter Roberson 2019-10-11
locations = find( Value_Is_Odd(C) );
where Value_Is_Odd is a function or expression that you write that takes in an array of values and returns a logical array of which entries are odd.
Hint: rem(), mod()
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timetry2
timetry2 2019-10-12
I ended up with a code that looks like this:
C = randi([100,200],1000,1000);
evenIndices = rem(C,2) == 0
allTheEvenNumbers = C(evenIndices)
allTheEvenNumbers = allTheEvenNumbers -1
locations = find(allTheEvenNumbers);
C(locations) = Inf
However, the odd numbers are not being replaced by Inf. What am I doing wrong?

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