How to remove empty struct fields [ ] from a group a struct fields ?

A: [1X1 struct] B: [1X1 struct] C: [1X1 struct] D: [ ] E: [ ] F: [ ] G: [ ] ,...................like this some structure are there. I want to remove those empty fields from that froup of fields.

Answer 1

[Jos (10584)]

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))

Answer 2

[sourav malla]

You can try like this:-

out = {t(~cellfun(@isempty,{t.places})).places};
t = cell2struct(out,{'places'},1);

[MSani]

When I load a matlab file, I am getting a struct with fields as below:

a =

struct with fields:

bt: {[1×1 struct] [] [] [] [1×1 struct] [1×1 struct]}

I would like to delete the empty fields in between. How do I do that and save the file without changing any structure to it?

I tried your solution but I got this error:

Dot indexing is not supported for variables of this type.

[Stephen23]

a.bt(cellfun('isempty',a.bt)) = []

[MSani]

@Stephen Thank you very much! This worked like a charm :)

How I should I then save the file? As I noticed that when I clicked on the save button, it seems to change the way the file is saved and messed up the array structures in the file.

Answer 3

[Robert]

% Create struct with empty fields.
s.a = 'notEmpty';
s.b = [];
s.c = '';
s.d = 12;

fields = fieldnames(s);
sOut = rmfield(s, fields(structfun(@isempty, s)));

sOut = 

  struct with fields:

    a: 'notEmpty'
    d: 12