better way to define xtype?

[刘昊戈]

I found it's really inconvenient to define the variable type when there are a lot of variables.

The way shown in the examples define the "xtype" as follows:

% Integer Constraints
xtype = 'BCCI';

Isn't there any better way to define it?

Let's say, for example, make it a vector or matrix of {0,1,2} which matches the size of input variable, where 0:B, 1:C, 2:I.

[Jonathan Currie]

You can use:  https://inverseproblem.co.nz/OPTI/index.php/Probs/MILP#longint

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