changing values in a certain column of a matrix
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I have a large matrix and in the fifth column I want to replace every value of 990 with 30.375, how could I do this easily? I found many similar questions but not exactly the same one and I tried to adapt the solutions to my situation but it hasn't worked yet..
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Cedric
on 4 May 2014
Edited: Cedric
on 4 May 2014
First, you build a logical index of all values equal to 990 in column 5:
lId = A(:,5) == 990 ;
Then you use it to index relevant elements of A (in column 5), that you set to 30.375:
A(lId,5) = 30.375 ;
Let me know if you need more information.
5 Comments
Cedric
on 4 May 2014
Thank you Image Analyst! Yes, I could have warned, but I always thought that I would be able to come back "within a few days", and I lost track of time!
Dogiparthi Santhosh Gupta
on 4 Apr 2021
Is the same logic applicable on a table with single column.
My problem is 'I have to replace the values of 2,3,4 in a single column of a table to 1' I tried with your logic but getting an error. Kindly suggest the perfect logic by anyone.
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