# How to replace 0 value with 3 in Matlab

2 views (last 30 days)
Med Future on 2 Dec 2022
Commented: Med Future on 2 Dec 2022
Hello, I hope you are doing well, I am trying to do two thing.
1. Find the number exist in fifth column of data e.g 0,1,2
2. Replace the 0 value in fifth column to 3

KSSV on 2 Dec 2022
c5 = Dataset(:,5) ;
% Find the number of 0, 1, 2
idx = c5 == 0 | c5 == 1 | c5 == 2 ; % gives logical indices
nnz(idx) % this gives total number
% Replace 0 with 3
c5(c5==0) = 3 ;
##### 2 CommentsShow NoneHide None
Med Future on 2 Dec 2022
@KSSV the output c5 only shows indexes not all the dataset value for example remaining four columns
Med Future on 2 Dec 2022
@KSSV why u use the following command if i have other indexes till 10 how it will work
idx = c5 == 0 | c5 == 1 | c5 == 2 ; % gives logical indices

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