How to vectorize 'for' loop in this code?

My code is like this...

c = 0;     
      for j = 3: 2 : size(READ,2)           
          c = c+1; 

      output(c) = .....
   end 

I want avoid 'c' and 'for loop' in my code but as you are seeing it is necessary to store the results of loop.

I want it to be like this

    j = 3: 2 : size(READ,2)           

      output = ....

But in this case all the outputs are not stored. I want this thing to make my code faster.

[Jan]

There is no benefit in vectorizing in general. Depending on what is hidden in ".....", a vectorized version can be slower or impossible to create. So please post this very important detail.

Using the index c is nice and efficient, if you pre-allocate the array output.

[Mr. 206]

Thanks.

I thought vectoring will make my code faster.

Answer 1

[madhan ravi]

You can preallocate output before the loop but to store the output your first way is the only way.

[Mr. 206]

Thanks.

I will do so .