Any list of the numpy supported functions?

[mrrezaie]

Hi, I'm looking for a list of numpy supported functions to see how I can formulate my problem. Is there any available? Thank you.

[peterdsharpe]

Hey @mrrezaie ,

Good news and bad news:

Bad news is that the only formal list, in this thesis (pg. 72), is somewhat out of date.

Good news is that the reason it's out of date is that many new functions have been added since then!

The most up-to-date place to look would be directly in the aerosandbox.numpy source code: https://github.com/peterdsharpe/AeroSandbox/tree/master/aerosandbox/numpy

NumPy functions here are categorized into different modules; if you have a question about a specific function, let me know and I'll try to point you in the right direction.

Best, Peter

[mrrezaie]

Thanks for your response. I was looking for something like this: https://numba.pydata.org/numba-doc/dev/reference/numpysupported.html

Does this error mean that numpy.gradient has not been supported yet? Or I'm doing something wrong here?

import casadi
import aerosandbox.numpy as np

opti = casadi.Opti()
A = opti.variable(10)
np.gradient(A, 0.01, edge_order=2)

AttributeError: 'MX' object has no attribute 'full'

Exception: Implicit conversion of symbolic CasADi type to numeric matrix not supported. This may occur when you pass a CasADi object to a numpy function. Use an equivalent CasADi function instead of that numpy function.

[cdhainaut]

numpy.gradient is not present in AeroSandbox master branch, but @peterdsharpe added it in the develop branch recently: https://github.com/peterdsharpe/AeroSandbox/blob/develop/aerosandbox/numpy/calculus.py.

The error you get: Exception: Implicit conversion of symbolic CasADi type to numeric matrix not supported. This may occur when you pass a CasADi object to a numpy function. Use an equivalent CasADi function instead of that numpy function.

Tells you quite explicitly that you try to use a non-casadi-supported numpy function

[mrrezaie]

I see; thanks for your help. Great to see you are improving numpy support. I hope casadi will do the same in near future. https://github.com/casadi/casadi/issues/2626

[cdhainaut]

I had some thoughts about this numpy/casadi interactions lately, actually. I'd be happy to have your opinions on that: https://github.com/peterdsharpe/AeroSandbox/discussions/120

[peterdsharpe]

@mrrezaie , AeroSandbox v4.2.0 was just released a few minutes ago which makes the newly-added numpy.gradient() public! pip install --upgrade aerosandbox[full] should pull in the changes.

[mrrezaie]

@peterdsharpe It is working very well, thanks a lot for your help.

@cdhainaut This is indeed a very good proposal. Actually, I know nothing about aerodynamics and aircraft, and casadi-numpy interaction was the only reason I'm using AeroSandbox. So, as a user and a beginner, I like this idea. However, it seems that casadi has already some plans to improve its numpy support. Perhaps you developers could collaborate with each other on this and make something fabulous.

Thanks again.