Check if any field in a given structure is empty
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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.
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Walter Roberson
il 6 Mar 2017
any( structfun(@isempty, YourStructure) )
5 Commenti
Gabor
il 5 Mar 2019
It dis not for me on a table:
a.table{1}=table();
a.table{2}=table();
>> any( structfun(@isempty, a.table{20}) )
Index exceeds matrix dimensions.
>> any( structfun(@isempty, a.table{2}) )
Error using structfun
Inputs to STRUCTFUN must be scalar structures.
How can I check if a.table{20} exists or not or empty? Anything that whould give me information of it exsistance? I could not find any function that could have helped so far.
Thank you
Più risposte (2)
Ross Nye
il 30 Nov 2017
I'm going to leave this here in case someone comes across this page looking for a similar answer to what I was.
I have a 1xN struct with many fields. One particular field was supposed to be boolean, but only the falses had been entered and the rest were []. The above answers didn't seem to help me, but I did find something on Reddit which did.
emptyIndex = find(arrayfun(@(MyStruct) isempty(MyStruct.myField),MyStruct));
I can then use emptyIndex to set the fields to true as needed.
HTH someone.
3 Commenti
Andres
il 27 Mag 2021
This will work as well
find(cellfun(@isempty,{MyStruct.myField}))
for a struct array MyStruct with field myField.
Note in many cases you don't need find for indexing.
Example: fill empty fields with 0s
MyStruct(3).myField = 123;
hasNone = cellfun(@isempty,{MyStruct.myField});
[MyStruct(hasNone).myField] = deal(0);
LeChat
il 13 Ago 2020
It might be a bit dirty because I use a loop but it works:
ind=[];
for ii=1:numel(MyStruct)
if isempty(MyStruct(ii).FieldName)
ind=[ind, ii];
end
end
Then ind contains all the indexes where the structure field is empty.
For instance if you then want to remove them from the structure:
MyStruct_init=MyStruct;
MyStruct(ind)=[];
Hope this helps!
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