z = [3 4 7 8
511 818 379 812];
when you are using min here, it is comparing rows with each other and giving you min value because it works rowwise
to change it to column type
min(z,[],2)
it will give you
ans =
3
379
if you just want to find the minimum value of 2nd row and it's index
[val,ind] = min(z(2,:))
if you want the corresponding value of 1st Row
z(1,ind)
If you want to the complete column of min
z(:,ind)
In 1 command
z(:,z(2,:)==min(z(2,:)))
