How to remove zero columns from array

Question

I have an array which looks similar to:

 0     2     3     4     0     0     7     8     0    10
 0    32    44    47     0     0    37    54     0    36
         


        

Answer 1

You could also use sum. Sum over the columns and any column with zeros only will be zeros after the summation as well.

sum(x,1)
ans =

    0   34   47   51    0    0   44   62    0   46

---

x(:,sum(x,1)>0)

ans =

    2    3    4    7    8   10
   32   44   47   37   54   36