Fun_SaveVars.m

function Fun_SaveVars(varargin)
%   Pack specified workspace variables into a structure
%
%   Example: If variables a, b, c exist in the workspace, calling
%            Fun_SaveVars('a','b','c','DataObs')
%       creates a structure named DataObs in the caller workspace,
%       with fields DataObs.a = a, DataObs.b = b, DataObs.c = c.
%
%   Notes:
%       - All inputs must be character vectors or string scalars.
%       - If a specified variable does not exist in the caller workspace,
%         a warning is issued and that variable is skipped.
%       - The output structure is assigned in the caller's workspace.

% Validate number of inputs
if nargin < 2
    error('At least two inputs are required: one variable name and one structure name.');
end

% Separate variable names and the target structure name
varNames = varargin(1:end-1);
structName = varargin{end};

% Validate structure name
if ~ischar(structName) && ~(isstring(structName) && isscalar(structName))
    error('The last input must be a valid structure name (character vector or string scalar).');
end
structName = char(structName);

% Validate all variable name inputs
if ~all(cellfun(@(x) ischar(x) || (isstring(x) && isscalar(x)), varNames))
    error('All variable name inputs must be character vectors or string scalars.');
end

% Build the structure by reading each variable from the caller workspace
S = struct();
for i = 1:numel(varNames)
    varName = char(varNames{i});
    % Check existence in the caller workspace
    if evalin('caller', ['exist(''', varName, ''', ''var'')']) == 1
        val = evalin('caller', varName);
        S.(varName) = val;
    else
        warning('Variable ''%s'' does not exist in caller workspace; skipped.', varName);
    end
end
% Assign the structure to the caller workspace with the given name
assignin('caller', structName, S);
% Inform the user
fprintf('Structure ''%s'' created with fields: %s\n', ...
    structName, strjoin(fieldnames(S), ', '));
% save(structName);
evalin('caller', ['save ' structName '.mat ' structName]);
end