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A parametric way of listing all elements of a struct array to be used for searching

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Claus Andersson
Claus Andersson 2021-7-5
评论： Claus Andersson 2021-7-5
Hi experts
I have a fairly large struct variable with integers, strings, sub-structs - in other words a mess.
Is there a way to exhaustively seek through a full struct array with whatever subvariables and variable classes are present in the struct?
Now, I was hoping there would be a general way to search through any type of struct array, e.g. data{:}{:}{:}, so the that all branches have been exhaustively searched all the way to the bottom, like in a recursive parametric format approach?
Even if not, is there a way to 'string out' the tree, as to f.ex. set the nodes of all subarrays to link to the level 1 variable as to 'linearize' the structure while searching for a particular string or number?
Even if not, any ideas would be welcome..
Best
Claus
  1 个评论
Claus Andersson
Claus Andersson 2021-7-5
Thanks 'Image Analyst'. I appreciate you taking time to answer! This is exactly what I needed, and it works, altough slow on my PC. I may have to consider establish SQL database down the road.
Again - many thanks!!

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Image Analyst
Image Analyst 2021-7-5
Here is a start for you:
s.a = 1;
s.b.x=2;
s.b.y=3;
s.c = 4
fn = fieldnames(s) % Show in command window.
numFields = length(fn);
values = zeros(numFields, 1);
for k = 1 : length(fn)
thisField = fn{k};
if ~isstruct(s.(thisField))
values(k) = s.(thisField);
fprintf('The value of s.%s is %f.\n', thisField, values(k));
else
% The field is another structure
% TODO: Recurse into it by calling this function again.
fprintf('s.%s is another structure.\n', thisField);
end
end
You'll see:
s =
struct with fields:
a: 1
b: [1×1 struct]
c: 4
fn =
3×1 cell array
{'a'}
{'b'}
{'c'}
The value of s.a is 1.000000.
s.b is another structure.
The value of s.c is 4.000000.

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