Create Integer Variable with Custom Step Size for Optimiz

Is it possible to create an optimizableVariable of integer type as an array with step different from 1?

uttamingh asked: 2021-04-13 deep learning , matlab , simulink ,

Explore creating integer-type optimizable variables as arrays in MATLAB with custom step sizes. Discover optimization techniques and workarounds for unique cons

Expert Answer

John Williams answered . 2025-07-15 15:57:33

Suppose X is an integer variable, that takes on only the values 1:5.

But what you want are non-integer levels of some parameter. For example, perhaps you want levels at [1.5, 3.5, 5.5, 7.5, 9.5]?

Inside your code, just write

Xhat = 2*X - 0.5;

Do you agree that Xhat takes on the desired levels?

They need not even be at all regular. Suppose you want levels at [2 3 5 7 11]? Inside your code, you might do this:

levels = [2 3 5 7 11];
Xhat = levels(X);

Clearly I could have chosen ANY levels there.

In your specific case, X is an integer variable that takes on the values 1:3. But you want it to take on the values [8 10 12]. Again, inside your code, write this:

Xhat = X*2 + 6;

Do you see that Xhat takes on only the values [8, 10, 12]?

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