清空筛选条件
清空筛选条件

find multiple words in a cell

2 次查看（过去 30 天）
Vincent I
Vincent I 2013-1-9
Hi, is there a way to compare and return a number for the matching words in two unequal cells?
A={'a','a','a','b','b','d'} B={'a','b','c','d','e','f','g','h'}
return C=3,2,0,1,0,0,0,0
Thank you

请先登录，再回答此问题。

采纳的回答

Ryan Livingston
Ryan Livingston 2013-1-9
A one-liner:
cellfun(@(x)sum(ismember(A,x)), B)

更多回答（3 个）

Matt J
Matt J 2013-1-9
If the "words" will really always be single letters, you could do it looplessly with
>> histc([A{:}], [B{:}])
ans =
3 2 0 1 0 0 0 0
  6 个评论
显示 4更早的评论
Matt J
Matt J 2013-1-9
编辑：Matt J 2013-1-9
And, although this is a new question, I feel that it is not far away for the initial question which I dont see why should require a new post
It doesn't require it, but if you post it as a new question, people have the opportunity to gain points from answering you (now that you've already accepted Ryan's answer), and so will be more incentivized to do so.
Jan
Jan 2013-1-10
编辑：Jan 2013-1-10
The decision is easy:
New question, new thread.
And:
Additional information to an existing question is added by editing the question and marking the changes by "[EDITED]". Then this is clarification and *not* a new question.
Hiding important information in deeply nested comments to already accepted questions is a bad idea.

请先登录，再进行评论。

Daniel Shub
Daniel Shub 2013-1-9
I am sure that this is over thinking the solution and I doubt that using regexp is optimal, but I was curious how bad it would be.
x = regexp(A, cell2mat(cellfun(@(x)['(?<', x, '>', x, ')|'], B, 'UniformOutput', false)), 'names');
cellfun(@(x)length([y.(x)]), fieldnames([x{:}]))'
I is there a better way to do this with regexp?
  1 个评论
Vincent I
Vincent I 2013-1-9
编辑：Vincent I 2013-1-9
Solved my problem by doing the folowing:
A=TF(:,1).';
A=regexprep(A, ' ','');
A=regexprep(A, '_(\w*)','');
B={'aa','bb2c','bb25c','xy3c','m56c','etc56c'};
C=cellfun(@(x)sum(strcmp(A, x)), B);
Thank you

请先登录，再进行评论。

Jan
Jan 2013-1-10
[EDITED, Jan, moved from comments to the accepted question]
ISMEMBER sorts the inputs and performs a binary search. This can be much faster and much slower than an unsorted comparison by:
cellfun(@(x)sum(strcmp(A, x)), B)
I claim without a proof, that a loop is faster:
R = zeros(1, numel(B));
for iB = 1:numel(B)
R(iB) = sum(strcmp(A, B{iB}));
end
[EDITED 2] And if you want to compare the leading character(s) only:
...
R(iB) = sum(strncmp(A, B{iB}, length(B{iB}));
...

类别

在 Help Center 和 File Exchange 中查找有关 Debugging and Analysis 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