search

dstndstn / tractor

The Tractor: measuring astronomical sources via probabilistic inference
Other
86 stars 24 forks source link

flux cannot changed during fitting #78

Open zouhu opened 8 years ago

zouhu commented 8 years ago

I try to use tractor galaxy profile fit an source using the scipy.optimize.fmin_l_bfgs_b (I didnot use tractor optimizer).During fitting the image, all parameters are changing except the flux. The flux value keep same. What is the reason

dstndstn commented 8 years ago

Could you please send a code snippet or test case?

What do you get if you do: tractor.printThawedParams() to show which parameters are being fit?

What happens if you use the tractor.optimize() routine instead? I have never tried using the scipy.optimize.* routines. Does the parameter vector you are using have enough elements?

Thanks!