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Concatenate name fields in nested structure

3 vues (au cours des 30 derniers jours)
Elzbieta
Elzbieta le 13 Juin 2024
Commenté : Voss le 15 Juin 2024
Hello,
I am trying to save value of the data placed in the last fields in nested structure by concatenating string in recursion. The name of the file should string composed of the all preceding fields in structure.
However I am not able to save previous fields.
The code is as follows:
nameDataBase = 'database.mat';
structNest = load([pathFolder, nameDataBase]);
structFields = myIsField(structNest, 'data');
pathOutputFile = pathFolder;
fileName = ''
function isFieldResult = myIsField (inStruct, fieldName)
% inStruct is the name of the structure or an array of structures to search
% fieldName is the name of the field for which the function searches
B = struct();
display('output folder')
isFieldResult = 0;
f = fieldnames(inStruct(1))
f1 = string(fieldnames(inStruct(1)))
for i=1:1%length(f)
display("i")
i
if(strcmp(f{i},strtrim(fieldName)))
isFieldResult = 1;
display('data found - end')
B.(f{i}) = inStruct(1).(f{i})
data = getfield(B,'data')
return;
elseif isstruct(inStruct(1).(f{i}))
isFieldResult = myIsField(inStruct(1).(f{i}), fieldName);
B.(f{i}) = inStruct(1).(f{i})
if isFieldResult
display('time found -loop')
return;
end
end
end
  1 commentaire
Ganesh
Ganesh le 13 Juin 2024
If you could upload the file 'database.mat' and describe what the output you would like to see is, it would be very helpful.

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Réponse acceptée

Voss
Voss le 13 Juin 2024
S = struct( ...
'A1',1, ...
'A2',struct('B1',2,'not_data',3,'data',4), ...
'A3',struct( ...
'B1',struct('not_data',5), ...
'B2',struct( ...
'C1',struct('data',6), ...
'data',struct( ...
'D1',struct('data',7)))))
S = struct with fields:
A1: 1 A2: [1x1 struct] A3: [1x1 struct]
S.A2
ans = struct with fields:
B1: 2 not_data: 3 data: 4
S.A3
ans = struct with fields:
B1: [1x1 struct] B2: [1x1 struct]
S.A3.B1
ans = struct with fields:
not_data: 5
S.A3.B2
ans = struct with fields:
C1: [1x1 struct] data: [1x1 struct]
S.A3.B2.C1
ans = struct with fields:
data: 6
S.A3.B2.data
ans = struct with fields:
D1: [1x1 struct]
S.A3.B2.data.D1
ans = struct with fields:
data: 7
function [out,data] = get_full_field_names(S,name,str)
out = strings(0);
data = cell(0);
if nargin < 3
str = "";
end
f = fieldnames(S);
for ii = 1:numel(f)
if isstruct(S.(f{ii}))
[new_out,new_data] = get_full_field_names(S.(f{ii}),name,str+f{ii}+".");
out = [out, new_out];
data = [data, new_data];
elseif strcmp(f{ii},name)
out = [out, str+name];
data = [data, {S.(f{ii})}];
end
end
end
[names,data] = get_full_field_names(S,'data')
names = 1x3 string array
"A2.data" "A3.B2.C1.data" "A3.B2.data.D1.data"
data = 1x3 cell array
{[4]} {[6]} {[7]}
[names,data] = get_full_field_names(S,'not_data')
names = 1x2 string array
"A2.not_data" "A3.B1.not_data"
data = 1x2 cell array
{[3]} {[5]}
[names,data] = get_full_field_names(S,'something_else')
names = 0x0 empty string array data = 0x0 empty cell array
  5 commentaires
Elzbieta
Elzbieta le 15 Juin 2024
Déplacé(e) : Stephen23 le 15 Juin 2024
Thank you for your comments. Voss your solution works great!
Voss
Voss le 15 Juin 2024
You're welcome and thank you!

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