清空筛选条件
清空筛选条件

cellfun is slow for lexical sort

2 次查看（过去 30 天）
Preethi
Preethi 2013-10-3
评论： Preethi 2013-10-4
Hi,
I am trying to lexicogrphically sort a matrix (size - 10000x 1) and i used cellfun, but it is very time consuming. Is there any way to speed up. I tried using for loop but i couldn't get the correct result. My code is
im_dct_num = num2cell(im_dct);
im_dct_temp = cellfun(@num2str,im_dct_num,'UniformOutput',false);
Thanking you in advance
Regards,
Preethi
  1 个评论
Walter Roberson
Walter Roberson 2013-10-3
So to check, you would want to sort 1 then 10 to 19 then 2 and so on?

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2013-10-3
You should find it faster to use
im_dct_temp = cellstr( num2str( im_dct(:) ) );
but then you need to decide about treating leading or trailing blanks. For example how should
2.00000000
sort relative to
2
? And would your preferred output for 2 be '2' or '2.' or '2.0' ?
  1 个评论
Preethi
Preethi 2013-10-4
It is working, speed has improved. If I have to use it for a matrix (ex. 19000 x 64) how do I modify the code?

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Matrices and Arrays 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