Avoiding for loop: Ordering and assigning order of Group data
2 views (last 30 days)
Show older comments
Hi
I have this data, and would like to order the loss within each group and assign the ordering index to each element.
tdata = table(["US";"US";"US";"UK";"UK";"TW";"TW";"TW";"TW"], [1;1;5;1.20000000000000;3;4;5;1;2],'VariableNames',{'name','Loss'});
name Loss
"US" 1
"US" 1
"US" 5
"UK" 1.20000000000000
"UK" 3
"TW" 4
"TW" 5
"TW" 1
"TW" 2
[ uniqGrp,~,JGrp]= unique( tdata( :,{'name'}));
tAll = table;
for runi= 1: height( uniqGrp)
tt = tdata( JGrp== runi, :);
tt = sortrows( tt, {'Loss'});
tt.idx = [1:height(tt)]';
tAll = [tAll; tt];
end
so final data tAll looks like this
name Loss idx
"TW" 1 1
"TW" 2 2
"TW" 4 3
"TW" 5 4
"UK" 1.20000000000000 1
"UK" 3 2
"US" 1 1
"US" 1 2
"US" 5 3
0 Comments
Accepted Answer
Matt J
on 23 Aug 2023
Edited: Matt J
on 23 Aug 2023
tdata = table(["US";"US";"US";"UK";"UK";"TW";"TW";"TW";"TW"], [1;1;5;1.20000000000000;3;4;5;1;2],'VariableNames',{'name','Loss'});
out=varfun(@gfunc,tdata,'Group','name','Input','Loss');
out=table(out.name,out{:,3}(:,1), out{:,3}(:,2), 'Var',["name","Loss","idx"])
function out=gfunc(y)
x=sort(y);
out=[x,(1:numel(x))'];
end
More Answers (0)
See Also
Categories
Find more on Get Started with MATLAB 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!