The problem is that varargin is not defined. Typically varargin refers to input arguments passed to a function. The code you are running appears to be a script, so varargin is not needed, since scripts take no input arguments.
- If your code is a script, you can remove varargin{:} and just use parse(p,DEM);
- If your code is a function and you need to use varargin to handle input arguments that may or may not be passed in, then you should define varargin in the function definition, as shown below, for example.
function DEM = test_DEM(DEM,varargin)
%%Parse Inputs
p = inputParser;
p.FunctionName = 'linear_inversion_ksn';
% required inputs
addRequired(p,'DEM', @(x) isa(x,'GRIDobj'));
% optional inputs
addOptional(p,'crita', 1e6, @(x) isscalar(x));
addOptional(p,'mn', 0.5, @(x) isscalar(x));
addOptional(p,'chi_inc', 1, @(x) isscalar(x));
addOptional(p,'gam', 10, @(x) isscalar(x));
addOptional(p,'flowOption', []);
parse(p,DEM, varargin{:});
DEM = p.Results.DEM;
end
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