if i have matrix x is 4 by 5, how can I retrieve the the row number and save it into y

so y=4

Answer 1

[Matt Tearle]

y = size(x,1)

[Matt Tearle]

FYI, z = size(x,2) gives you the number of columns

[Hello Blower]

thanks a lot

Answer 2

[Matt Fig]

x = ceil(rand(4,5)*20);  %  An example matrix.
y = size(x,1);  % Is this what you mean?
y2 = x(4,:); % Or did you mean this?

[Hello Blower]

thanks a lot