Averaging in a cell array
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avantika
le 11 Sep 2014
Commenté : Andrei Bobrov
le 12 Sep 2014
Hi!
I have a cell array named data (4856x24). The data looks as follows
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/145365/image.png)
I want to write a function that averages out the values in each row for positive emotions (Happy,Romantic,Devotional,Calm) and negative emotions(Angry,Longing,Sad,Tensed).The averaged out value column names should be positive and negative respectively. Can anyone pls help. Thanks in advance.
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Adam
le 11 Sep 2014
I'm not sure what you mean by averaging out when the inputs are strings.
I would suggest you use a struct or table (if you are using Matlab 2014) though for your data as having column headings as the first row of a cell array is a lot less easy to work with than having them as fields of a struct or table headings.
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Andrei Bobrov
le 11 Sep 2014
t1 = ~cellfun('isempty',regexp(data(1,:),'Happy|Romantic|Devotional|Calm'));
t2 = ~cellfun('isempty',regexp(data(1,:),'Angry|Longing|Sad|Tensed'));
out = [data(1,:);cell(1,size(data,2))];
out(2,t1) = num2cell(mean(cell2mat(data(2:end,t1))));
out(2,t2) = num2cell(-mean(cell2mat(data(2:end,t2))));
3 commentaires
Andrei Bobrov
le 12 Sep 2014
Hi Avantika! I beg to fulfill the request by Sean, he will show us a more better solution with table array.
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Sean de Wolski
le 11 Sep 2014
Modifié(e) : Sean de Wolski
le 11 Sep 2014
If you convert that to a table (cell2table) and covert the feelings to a categorical, you can then use grpstats and varfun to do this for you, grouping by whatever you want.
If you post the mat file (as a zip) I can help you through these steps, it'll be much simpler and easier to understand than regular expressions/cellfun.
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