Add new line in .ini file

I'm trying to set the properties of a class by loading the contents of the initialization file in a class method.

Source for INI class (https://www.mathworks.com/matlabcentral/fileexchange/55766-ini).

classdef setting
    
    properties(Constant)
        test_graph = settings_utils.data.test_graph;
    end
    
    methods(Static)
        function data = load_data
            I = INI('File','input.ini');
            I.read();
            data = I.get('UserData'); % struct
        end
    end
end

example.ini includes the following

[UserData]
test_graph = struct( ...
    'test1', false, ...
    'test2', false, ...
    'test3', false)

>>> settings.test_graph

ans =

'struct(...'

I would like to know how to add new line in .ini files.

I tried to add `...` which is how I add multiple lines in .m files. But this doesn't work i.e the struct is not read correctly from the .ini file; it is read as a string.

[Rik]

This code will not write anything to a file. After more than one hundred questions you should know to give a bit of context. I should not have to read your last several questions to guess what ini file you might be talking about and what format it might have.

[Deepa Maheshvare]

My mistake, I will add more details.

[Deepa Maheshvare]

@Rik please have a look

[Stephen23]

@Deepa Maheshvare: INI does not appear to be a MATLAB function/class. Did you write it? Or is it from a third-party?

Please give a link to the INI function/class.

[Walter Roberson]

Are you using https://www.mathworks.com/matlabcentral/fileexchange/24992-ini-config ?

[Deepa Maheshvare]

@Stephen and @Walter Roberson

I'm sorry, I forgot to add the reference.

Please find the INI class link here

https://www.mathworks.com/matlabcentral/fileexchange/55766-ini

Answer 1

[Jacob Mathew]

I was able to reproduce the difficulty you were facing using the same INI Add on in MATLAB R2021a. However, even after multiple approaches of declaring multi-line values, the read function of this specific Add On only reads a single line.

A possible workaround is to write the entire struct in a single line in the INI file as follows:

% input.ini file
[UserData]
test_graph =  struct('test1',false,'test2’,false,’test3’,false)

The documentation for struct can be found here:

https://www.mathworks.com/help/releases/R2021a/matlab/ref/struct.html

Then when you perform the read operation, it will be read as a struct. The following code and screenshot below demonstrate the same:

% MATLAB Code to read from the INI file
File = 'input.ini';
I = INI('File',File);
I.read();
data = I.get('MyData');