MATLAB: What is an alternative FIND function that find indices and values of both ZERO and NONZERO elements in Matlab

nonzerovector

Hello,
I am using Matlab and I would like to know how to find indices/values of both zero and nonzero elements of a given vector ? Can anyone help ?
For example:
X = [1 0 2; 0 1 1; 0 0 4];
How can I find indices of the elements in the first raw i.e. '1'; '0'; '2' ?
Thank you!

Best Answer

>> E = [2, 0, 5, 9];
>> [R,C] = ind2sub(size(E),1:numel(E))
R =
   1   1   1   1
C =
   1   2   3   4
Or using your original example:
>> X = [1 0 2; 0 1 1; 0 0 4];
>> [R,C] = ind2sub(size(X),1:numel(X))
R =
   1   2   3   1   2   3   1   2   3
C =
   1   1   1   2   2   2   3   3   3
or just the first row (as your question request) is very simple:
>> C = 1:size(X,2)
C =
   1   2   3
>> R = ones(size(C))
R =
   1   1   1
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