Function to create struct with parameters
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Felix Müller
on 26 Apr 2021
Commented: Felix Müller
on 27 Apr 2021
Currently I have a function with settings/parameters for my program, where all parameters are written into a struct like "inp.month = 7;" so that I can pass the struct "inp" to functions afterwards. Is it possible to have all the assignments in the function without the struct, eg "month = 7;" and at the end somehow get 'all variables in this function' into the struct "inp". Something like "inp = <gather all variables assigned in this function>", and then have the struct be the output. It would add readability in my opinion and also I thought this to be easy, but didn't find a good solution yet and thought I'd ask here.
Cheers
Felix
5 Comments
Bruno Luong
on 27 Apr 2021
This request is interesting only for lazy programmers who wants to make a quick and dirty code.
Just create a struct with the list of variables that you control explicitly.
Accepted Answer
Jeff Miller
on 26 Apr 2021
Maybe you would like something like this?
month = 1;
year = 1951;
day = 11;
inp = CreateStruct(month,day,year)
function outstruc = CreateStruct(varargin)
% Create a structure with the input variables as fields.
outstruc = struct;
for iField=1:numel(varargin)
sfName = inputname(iField);
outstruc.(sfName) = varargin{iField};
end
end
More Answers (2)
Walter Roberson
on 26 Apr 2021
The following code is not recommended.. but it should work.
ZZ_filename = [tempname '.mat'];
save(ZZ_filename, '-struct', '-regexp', '^[^Z]', '^Z[^Z]');
inp = load(ZZ_filename);
delete(ZZ_filename);
If you already have variable names that begin with 'ZZ' then this code would have to be modified.
The purpose of the -regexp is to allow saving all of the variables except the over-head variable ZZ_filename .
3 Comments
Walter Roberson
on 26 Apr 2021
Then you will need to write code that uses dynamic variable naming, which is not at all recommended.
Hint: who() returns names of variables.
Bruno Luong
on 27 Apr 2021
s = buildparams()
function s = buildparams()
a = 1;
b = 2;
s = gathervars();
end
function s = gathervars()
vars = evalin('caller', 'whos');
for k=1:length(vars)
name = vars(k).name;
s.(name) = evalin('caller', name);
end
end
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