copy datas, one above the others, in a new matrix

Hi! I am a beginner in matlab.

I want to copy the first two columns of my variable cnt in a new variable called o : and my 3rd column = 1 :

[i,j] = size (cnt) ;
o(:,1:2) = cnt(:,1:2) ;
o(:,3) = 1 ;

Then I have new datas from cnt2, and I want to copy the first two columns UNDER the datas I have already copied from cnt : and my 3rd column = 2 for these news datas :

[h,k] = size (cnt2) ;
o(i:i+h,1:2) = cnt2(1:h,1:2) ;
o(i:i+h,3) = 2 ;

I have this error message:

Subscripted assignment dimension mismatch.

Can you help me? Thank you! Aude

Answer 1

[the cyclist]

In place of this ...

o(i:i+h,1:2) = cnt2(1:h,1:2) ;
o(i:i+h,3) = 2 ;

I think you intended this ...

o(i+1:i+h,1:2) = cnt2(1:h,1:2) ;
o(i+1:i+h,3) = 2 ;

[Aude Rapet]

Oh yes that's it! Thank you very much!!