To speed up your code, you can try using the `arrayfun` function instead of `cellfun`. Here's an updated implementation that should help improve the performance:
for i = 1:length(channelGroup)
parent = uitreenode(app.Tree, "Text", channelGroup(i).AcquisitionName);
tt = data{i};
nVarNames = length(tt.Properties.VariableNames);
nChannelGroups = length(channelGroup);
child = arrayfun(@(j) uitreenode(parent, "Text", tt.Properties.VariableNames{j}), 1:nVarNames);
end
In this updated code, `arrayfun` is used to create an array of `uitreenode` objects directly, avoiding the need for an inner loop. The anonymous function `@(j)` is used to iterate over the indices `1:nVarNames` and create the `uitreenode` objects with the appropriate text.
Note that the `wb` waitbar is commented out in this code snippet. If you need to include it, you can uncomment it and update the progress calculation accordingly.
I hope it helps!
