How to group string datasets?

1 次查看（过去 30 天）
Matthew
Matthew 2014-4-17
评论： Matthew 2014-4-22
I have the following dataset:
ID_Ref SP MD FI
123456 [] [] 'A+'
234567 [] [] 'A'
234567 [] [] 'A'
345678 [] [] 'A+'
345678 [] 'Aa2' []
456789 [] [] 'A+'
456789 [] 'Aa2' []
456789 ‘AA+’ 'Aa2' []
All the column arrays are string.
How do I group the above dataset by unique ID_Ref to read:
ID_Ref SP MD FI
123456 [] [] 'A+'
234567 [] [] 'A'
345678 [] 'Aa2' 'A+'
456789 ‘AA+’ 'Aa2' 'A+'
Apologies if you are unable to read this table in this message box.

请先登录，再回答此问题。

采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2014-4-17
编辑：Azzi Abdelmalek 2014-4-17
Edit
ratings={123456 [] [] 'A+'
234567 [] [] 'A'
234567 [] [] 'A'
345678 [] 'Aa2' 'A+'
456789 'AA+' 'Aa2' 'A+'
345678 [] 'Aa2' []
456789 [] [] 'A+'
456789 [] 'Aa2' []
456789 'AA+' 'Aa2' []}
A=cellfun(@num2str,ratings,'un',0);
c1=cell2mat(ratings(:,1));
[ii,jj,kk]=unique(c1,'stable');
cc=size(A,2);
out=cell(numel(ii),cc);
for k=1:numel(ii)
idx=find(kk==k);
out{k,1}=ii(k,1);
for mm=2:cc
a=A(idx,mm);
b=unique(a);
out{k,mm}=b{end};
end
end
out(cellfun(@isempty ,out))={[]}
  4 个评论
显示 2更早的评论
Matthew
Matthew 2014-4-22
Hi Azzi,
I have used your code above again and it works to a certain extent:
Here is the code I have used but I am getting the following error now:
"Index exceeds matrix dimensions."
This error is occurring from the for line stage.
Here is the code I have used:
Ratings = dataset2cell(Ratings);
Ratings = cellfun(@num2str,Ratings,'un',0);
[ii,jj,kk] = unique(Ratings,'stable');
cc = size(Ratings,2);
Ratings1 = cell(numel(ii),cc);
for k=1:numel(ii)
idx=find(kk==k);
Ratings1{k,1}=ii(k,1);
for mm=2:cc
a=Ratings(idx,mm);
b=unique(a);
Ratings1{k,mm}=b{end};
end
end
Ratings1(cellfun(@isempty ,out)) = {[]};
Can you help me from the for line stage please as it still producing the final unique table with merged rating and how I bypass/ correct so this error message does not appear?
Thanks
Matthew
Matthew 2014-4-22
Okay I have done a bit more digging and it is to with the following function:
[ii,jj,kk] = unique(Ratings,'stable');
It is taking into account the Rating column headers i.e. SP, MD and FI and the values these columns can take and then putting that in the ii table at the bottom.
Any suggestions how to make the function work properly?

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 Data Type Conversion 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