Can you do a parfor if Parallel Toobox is present else do a for

Is there a way: if the Parallel Toolbox is present then do the following loop with a parfor else use a for

I realize that ~isempty(which('parfor')) is true if the Parallel toolbox is present. I want to do:

if(~isempty(which('parfor')))
  parfor j = 1:Lz
else
  for j = 1:Lz
end

Next come the body of the loop.

Also I would like to do:

 if(Lx <= 30000) % Small enough don't need parallel
   for j = 1:Lz
 else
   parfor j = 1:Lz
 end

Next comes the body of the loop.

Matlab complains "Illegal use of reserved keyword "else"."

Answer 1

[Walter Roberson]

You do not need to do this. If you do not have the Parallel Computing Toolbox, parfor is automatically processed as a for loop.

[John Fox]

The answer was:

if(Lx <= 30000) % Small enough don't need parallel for j = 1:Lz % do what you want end else parfor j = 1:Lz % do what you want end end

I already figured out that this would work. However, both "do what you want" are the same 2 pages of code. I was hoping to avoid having two copies of two pages of code.

This seems like such an obvious issue. Is there no elegant solution other than just repeating lots of code?

[Walter Roberson]

Put the code into a function. Call it in both places