Find unique combinations of double and character elements

7 ビュー (過去 30 日間)
Maria
Maria 2014 年 8 月 10 日
回答済み: Yu Jiang 2014 年 8 月 10 日
I have a cell type variable with 3 columns and 500000 rows, here is an example:
c1 c2 c3
A={1994 'AACE' 2071
1994 'AACE' 30677
1994 'AAC' 1541
1994 'AAC' 2027
1994 'AAC' 7843}
I am applying the following code:
%Unique combinations of c1 and c2
[y,~,ind] = unique([num2str(c1) c2], 'rows'); %Problem
%Count occurences
c = accumarray(ind,1);
%Final variable
F = [y c];
But it gives me an error in the first row, because I am trying to find unique combinations of 'double' and 'char' elements. Can someone help me? Thanks
  2 件のコメント
Maria
Maria 2014 年 8 月 10 日
Hi Yu,
it gives this error: Error using horzcat Dimensions of matrices being concatenated are not consistent.

サインインしてコメントする。

採用された回答

Azzi Abdelmalek
Azzi Abdelmalek 2014 年 8 月 10 日
編集済み: Azzi Abdelmalek 2014 年 8 月 10 日
A={1994 'AACE' 2071
1994 'AACE' 30677
1994 'AAC' 1541
1994 'AAC' 2027
1994 'AAC' 7843};
c12=cellfun(@(x,y) [num2str(x) y],A(:,1),A(:,2),'un',0);
[y,ii,ind] = unique(c12) %Problem
c = accumarray(ind,1);
F = [A(ii,:) num2cell(c)]

その他の回答 (2 件)

Andrei Bobrov
Andrei Bobrov 2014 年 8 月 10 日
[y0,~,ii] = unique(A(:,2));
[y,~,i0] = unique([cell2mat(A(:,1)),ii],'rows')
F = [num2cell(y(:,1)),y0,num2cell(accumarray(i0,1))];
  1 件のコメント
Maria
Maria 2014 年 8 月 10 日
It gives the following error: Error using horzcat Dimensions of matrices being concatenated are not consistent.

サインインしてコメントする。


Yu Jiang
Yu Jiang 2014 年 8 月 10 日
I believe both the answers by Andrei Bobrov and Azzi Abdelmalek are correct. The error message should be caused by your original definition of A. If you create A exactly as Azzi does, then there should be no problem.
By the way, they both use the function cellfun, which is very convenient for cell operations. More details can be found here (Documentation) .

カテゴリ

Community Treasure Hunt

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

Start Hunting!

Translated by