Delete empty field - rows in a structure

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SS
SS il 25 Lug 2019
Commentato: Hamza Imtiaz il 21 Set 2020
I have a structure which has some empty field - rows. How can, I delete these empty them from the structure?
  6 Commenti
Stephen23
Stephen23 il 25 Lug 2019
"I want to delete the whole row from the structure"
Your structure only has one row (your screenshot shows that it has size 1x935).
Do not confuse the size of the structure itself with the sizes of its fields, as Guillaume already explained.
Guillaume
Guillaume il 25 Lug 2019
Yes, the structure has only one row and 935 columns and it's the columns you want deleted. When the structure array is a vector matlab displays it in a tabular format along the rows regardless of whether it's a row vector or a column vector.
You may want to consider using a table instead of a structure. This would be a lot easier for you to manipulate. I'll write that as an answer.

Accedi per commentare.

Risposta accettata

Adam
Adam il 25 Lug 2019
Added as an answer since it seemed to solve the problem.
Track_20( all( cell2mat( arrayfun( @(x) structfun( @isempty, x ), Track_20, 'UniformOutput', false ) ), 1 ) ) = [];
would work, I think, though it looks ghastly. I'm sure there is probably a simpler way!

Più risposte (2)

Andrei Bobrov
Andrei Bobrov il 25 Lug 2019
Modificato: Andrei Bobrov il 25 Lug 2019
out = Track_20(all(~cellfun(@isempty,struct2cell(Track_20))));

Guillaume
Guillaume il 25 Lug 2019
Modificato: Guillaume il 25 Lug 2019
As commented, you may want to use a table instead of a structure. tables are a lot easier to use:
t_track20 = struct2table(track_20); %convert structure to table
%t_track20 = rmmissing(t_track20); %remove empty rows. All done!
edit: actually no, it's more complicated, as rmmissing doesn't work with cell arrays variables.:
toremove = rowfun(@(varargin) isempty([varargin{:}]), t_track20, 'ExtractCellContents', true);
t_track20(toremove, :) = [];
You may still want to use a table, generally it is easier to work with than structures. You can easily index table by row or by variables.

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