what is the meaning of these two lines?

siz = size(P);
for i = 1:siz(2)

with P is a 2*k matrix, P =[p1 .....pk] I want to understand what siz(2) means in the for loop. Thanks!!

Answer 1

[Geoff Hayes]

Saf - the size function returns the dimensions of the input parameter. In your case, if P is a 2x12 matrix so size(P) is

 siz = size(P);
 siz = 
  [ 2 12 ]

The for loop then iterates from 1 to siz(2) which (in this case) will be 12. So the loop will iterate over the number of columns in P.

[Fangjun Jiang]

the original code could be replaced by

for i = 1:size(P,2)

[Saf el]

I understand it now. Thank you Geoff!

[Saf el]

Fangjun- yes, it works. Thank you for your help!