I have successfully used LinearAlgebra.linear_least_squares to estimate solutions to continuous functions. The coefficients returned in that case are of course floating-point values.
Now I have a problem where some of the terms are continuous but some must be constrained to integer multiples. As a simple example,
y = c1 * x^2 + c0 * x
where c1 is floating-point in the usual way, but c0 can only be integer-valued. (The actual problem has many more terms.)
Can anyone tell me how to constrain some of the coefficients to integer values?