Java Apache Commons Math, linear least squares (fitting) with constraints -

Java Apache Commons Math, linear least squares (fitting) with constraints -

i'm trying utilize apache commons math library in java (latest version) solve linear to the lowest degree squares problem, there constraint on solution.

specifically, want solution contain positive values. in other words, want find best fit of basis functions such solution weights greater 0.

if has tracked particular problem downwards , solved it, grateful solution!

java apache-commons curve-fitting linear-regression least-squares