Help with findgroups command
15 views (last 30 days)
Show older comments
I want to sum the first 3 values in the second column for each category.
For example, in this case I want the result to be:
apples: 4
orange: 2
I have the following code and i can't get it to work. Thanks!
a={'apples' 1 2;
'orange' 2 3;
'apples' 3 4;
'Pear' 4 5;
'apples' 5 6;}
[G,fields]=findgroups(a(:,1));
a(1:3)
G(1:3)
b=a(:,2)
X=splitapply(@sum, b ,G);
0 Comments
Accepted Answer
Akira Agata
on 20 Jul 2021
Like this?
a = {...
'apples' 1 2;...
'orange' 2 3;...
'apples' 3 4;...
'Pear' 4 5;...
'apples' 5 6;};
% Extract the first 3 items
a2 = a(1:3,:);
% Apply findgroups
[G, fields] = findgroups(a2(:,1));
% Execute splitapply
x = splitapply(@sum, cell2mat(a2(:,2)), G);
% Summarize the result
tResult = table(fields, x,...
'VariableNames',{'Item','Value'});
% Show the result
disp(tResult)
0 Comments
More Answers (0)
See Also
Categories
Find more on Software Development Tools in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!