append to a table using findgroups and splitapply

4 Ansichten (letzte 30 Tage)
Qiana Curcuru
Qiana Curcuru am 20 Jul. 2021
Beantwortet: Simon Chan am 20 Jul. 2021
I have a for loop that creates a table every iteration but i just want to append the new data table to the end of the last table that was made instead of over writing the table every iteration. how would i do that?
for i=1:10
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)
end

Antworten (1)

Simon Chan
Simon Chan am 20 Jul. 2021
Create an empty cell and empty array before the loop.
Then create the table after the loop.
combinefields={}; % Empty cell
combinex = []; % Empty array
for i=1:10
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
combinefields = vertcat(combinefields, fields); % Combine 'fields'
combinex = [combinex; x]; % Combine 'x'
end
tResult = table(combinefields, combinex,... % Create table after finishing the loop
'VariableNames',{'Item','Value'});
%% Show the result
disp(tResult)

Kategorien

Mehr zu Software Development Tools finden Sie in Help Center und File Exchange

Produkte


Version

R2018b

Community Treasure Hunt

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

Start Hunting!

Translated by