MATLAB: Name-Value Pairs error

Question

I am trying to solve this question using "name_value_pairs" but it is accepting "wrong type for name", rest the code is running just fine …

Can you please guide me what am i doing wrong!

The code i am using is given below!

function db = name_value_pairs(varargin)
d=0;
if (nargin == 0 || rem(length(varargin),2)~=0)
    d = cell (0,0);
else
    for i = 1:2:length(varargin)-1
        if ~ischar(varargin{i})
            d= cel(0,0);
            break
        end
    end
end
if isequal(d,cell(0,0))
    db = cell(0,0);
else
    db = reshape(varargin,2,length(varargin)/2)' ;
end
end

Answer 1

If you use inputParser, you can define validation functions

https://www.mathworks.com/help/matlab/ref/inputparser.html#d122e665225

https://www.mathworks.com/help/matlab/matlab_prog/input-parser-validation-functions.html