nested for loops conditions

Hello, I am trying to create a periodic mesh in x and y. So I loop the rows using i and loop columns using j. I want to omit rows -3, -2, 0, and 8. I want to omit the column number 3. I am using the following lines:

for (i=-n_row/2:n_row/2)
   for (j=-n_col/2:n_col/2)  
      if ((i!=-3) and (i!=-2) and (i!=0) and (i!=8) )
         do my function;
      end
   end
end

These statements omit the rows efficiently. But I do not know how to omit the column. Any help??

Answer 1

[ttopal]

You are actually not using matlab syntax. And if you are comparing a value to list of values ( like i and -3,-2,0,8) you might want to use a function for that.

for i=-n:n
   for j=-m:m  
      if (~ismember(i,[-3,-2,0,8]) && j~=0)
          do my function
      end
   end
end