# How can I print row number to matrix in matlab?

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Berfin Çetinkaya on 16 Mar 2022
Commented: Berfin Çetinkaya on 17 Mar 2022
How can I print row number to matrix in matlab?
I have a matrix and I want to print the row number on the cells that write 1 in this matrix. How can I do it?
Maybe it will be clearer if I explain with an example.
first row 1 0 1
second row 0 0 1
third row 1 1 0
fourth row 0 1 1
This is my matrix. I want to convert this matrix to this with code:
first row 1 0 1
second row 0 0 2
third row 3 3 0
fourth row 0 4 4
The values of 1 in the second row got the value 2 because they were in the second row, those in the third row got the value 3. 0 values remained the same. How can I do this in a large matrix?
thank u
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Berfin Çetinkaya on 17 Mar 2022
Maybe it will be clearer if I explain with an example.
first row 1 0 1
second row 0 0 1
third row 1 1 0
fourth row 0 1 1
This is my matrix. I want to convert this matrix to this with code:
first row 1 0 1
second row 0 0 2
third row 3 3 0
fourth row 0 4 4
The values of 1 in the second row got the value 2 because they were in the second row, those in the third row got the value 3. 0 values remained the same. How can I do this in a large matrix?

David Hill on 17 Mar 2022
M=randi(2,10,3)-1;%sample matrix
newM=M.*(1:size(M,1))';
Berfin Çetinkaya on 17 Mar 2022
This answer is correct. Thank u so much

Stephen23 on 17 Mar 2022
M = [1 0 1; 0 0 1; 1 1 0; 0 1 1]
M = 4×3
1 0 1 0 0 1 1 1 0 0 1 1
V = 1:size(M,1);
Z = V(:).*M
Z = 4×3
1 0 1 0 0 2 3 3 0 0 4 4
Berfin Çetinkaya on 17 Mar 2022
Thank u so much