Consider preallocating for speed

2 次查看（过去 30 天）
Tom
Tom 2014-2-13
编辑： per isakson 2014-2-13
Hello,
My lengthy program is littered with 'Consider preallocating for speed' suggestions for numerous variables.
What does a more experienced programmer do to circumvent this? Do I really need to allocate space at the start for every variable which this is suggested for?
Kind regards,
Tom

请先登录，再回答此问题。

回答（1 个）

per isakson
per isakson 2014-2-13
Litter the program with lines like
A = zeros(25000, 10000);
and read http://www.mathworks.se/help/matlab/matlab_prog/preallocate-memory-for-a-cell-array.html
  2 个评论
Tom
Tom 2014-2-13
That was pretty much what I thought. However I'm getting:
Subscripted assignment dimension mismatch.
Any idea what I'm doing wrong?
per isakson
per isakson 2014-2-13
编辑：per isakson 2014-2-13
Dimension of left and right hand side must agree for existing variables(??)
Show a line, which causes this error.
The Mathworks server is choked?

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Logical 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by