MATLAB: Check if any field in a given structure is empty

structstructures

Hello everyone,

I have a structure with quite some fields and I want to check, if any of the fields are empty. Is there a way to do this without checking for each field individually?

Currently I have an if statement with many ORs to do this:

if isempty(structure.field1) || isempty(structure.field2)

and so on

I tried to do the same with

any(isempty(fieldnames(structure))

but obviously the fieldnames are not empty.

Best Answer

any( structfun(@isempty, YourStructure) )

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MATLAB: Converting nested “summary” structure to table

Here's the loop version. There may be another way, but I didn't have any luck fighting with Matlab's tricky multiple-cell return behaviour

% create minimal test structure
mystruct.Days_from_development = struct('size',[118,1],'Type','double');
mystruct.HIV = struct('size',[52,3],'Type','string');
% get a list of all the fieldnames (i.e. substructures, i.e. names of tables)
table_names = fieldnames(mystruct);
% loop over substructures
for ind=1:length(table_names)
    % get the string for each substructure's name
    tmp = table_names{ind};
    % dump the substructure to a table row
    % by turning it into a 1xN cell array and putting the substructure string as the first cell
    mytable(ind,:) = cell2table([{tmp} struct2cell(mystruct.(tmp))']);
end
% rename the table variables appropriately
mytable.Properties.VariableNames = [{'table_name'};fieldnames(mystruct.(tmp))]

MATLAB: How to remove empty struct fields [ ] from a group a struct fields

Does this do what you want?

% create a structure with empty fields
S.A = 'x' ; S.B = [] ; S.C  = 1:5 ;
fn = fieldnames(S)
tf = cellfun(@(c) isempty(S.(c)), fn)
S2 = rmfield(S, fn(tf))

Best Answer

Related Solutions

MATLAB: Converting nested “summary” structure to table

MATLAB: How to remove empty struct fields [ ] from a group a struct fields

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