Error with parfor loop

1 次查看（过去 30 天）
Mate 2u
Mate 2u 2012-2-20
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.
  2 个评论
Mate 2u
Mate 2u 2012-2-20
The error is only coming from the line...
price(i)=data(1,i).bidPrice(1,1);
Oleg Komarov
Oleg Komarov 2012-2-20
The mlint message is already helping you.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Edric Ellis
Edric Ellis 2012-2-20
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)'.
  1 个评论
David Allen
David Allen 2012-6-11
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.

请先登录，再进行评论。

更多回答（1 个）

David
David 2012-2-20
Have you tried pre-allocating "data"?
e.g.
data = struct('bidPrice',cell(1,5));
  1 个评论
Mate 2u
Mate 2u 2012-2-20
Hi that does not work, additionally I need it within the loop as I will be plotting as the loop iterations increase.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by