How To Execute "if-else" Statement.

Hi,

I am having problem to execute an "if-else" statement in matlab of the foll. eqtn.

    Xc=sum(i:1 to 3)sum(j:1 to 3)[(a(i,j)-a(m))*h(i,j)*x]/sum(i:1 to 3)sum(j:1 to 3)[(a(i,j)-a(m))*h(i,j)];
    Yc=sum(i:1 to 3)sum(j:1 to 3)[(a(i,j)-a(m))*h(i,j)*y]/sum(i:1 to 3)sum(j:1 to 3)[(a(i,j)-a(m))*h(i,j)];

Where:

1. sum(i:1 to 3)=represents summation where i goes from 1 to 3
2. a(i,j): 3x3 matrix[3 6 8; 2 5 6; 9 4 5];
3. a(m): middle element of the matrix a(i,j);
4. h(i,j)={ 1, if a(i,j)>=a(m) &
5. 0, if a(i,j)<a(m).
6. [x y]=meshgrid(-1:2/2:+1, -1:2/2:+1).

Can anyone implement the foll. eqtn by correctly stating the condition of h(i,j).

Thanking You!

[Azzi Abdelmalek]

 if condition1
   calcul1
 elseif condition2
   calcul2

 ....
 elseif condition n
   calculn
 end

[Image Analyst]

What do you mean by "middle"? The (2,2) element, or the median value? I think a(m) means a(2,2), right? Is this homework (looks like it)?

[Dishant Arora]

you have asked the same question again. http://www.mathworks.in/matlabcentral/answers/47101#answer_57577 didnt it help you out. you tried doing it.?? if you are facing any problem implementing that, u should make a comment there rathar then creating new question.

[Jan]

Please, Pranjal, do not post multiple questions for one problem. This wastes the time of the ones, who want to help.