Error with parfor loop

Hi there, I am trying to run the following:

INPUT:

    parfor i=1:1:5

      data(i)=IBMatlab('action','query','symbol','EUR','localSymbol', 'EUR.USD', 'secType', 'cash', 'exchange', 'idealpro');

      price(i)=data(1,i).bidPrice(1,1);  

    end

OUTPUT:

??? Error: The variable data in a parfor cannot be classified. See Parallel for Loops in MATLAB, "Overview".

Any help anybody? WHEN I USE NORMAL FOR LOOP IT WORKS.

[Mate 2u]

The error is only coming from the line...

price(i)=data(1,i).bidPrice(1,1);

[Oleg Komarov]

The mlint message is already helping you.

Answer 1

[Edric Ellis]

You need to ensure that you're indexing 'data' in a consistent manner inside the PARFOR loop. It should work to make both references either 'data(1,i)' or 'data(i)'.

[David Allen]

To make this clear, as the help file is poor on this. You need something like this:

z(s).a= ....

z(s).b=.....

This one drove me mad.

Answer 2

[David]

Have you tried pre-allocating "data"?

e.g.

data = struct('bidPrice',cell(1,5));

[Mate 2u]

Hi that does not work, additionally I need it within the loop as I will be plotting as the loop iterations increase.