MATLAB: I have a matrix and I am actually interested in obtaining a vector that will consist of the first column in each row that has values lower certain value.

findfirst

I have a matrix and I am actually interested in obtaining a vector that will consist of the first column in each row that has values lower 3. e.g if I have A=[ 5 7 8 3 2 ;6 2 1 4 4;1 2 3 4 5; 4 5 2 1 3]. I expect an Ans: [5;2;1;4]

Best Answer

Thanks Star Strider and MathsReallyWork. I kind of figure it out.Ans: [5;2;1;3]
dmax=3
Nrows=4
 A=[5 7 8 3 2 ;6 2 1 4 4;1 2 3 4 5; 4 5 2 1 3]
for i=1:Nrows
  B=A(i,:)';
  a(i)=find(B<dmax,1,'first') ;
end
b=a'
Related Question