I am trying to istall it on a RPi 3. I have the hardware working but have problems withe the software.
I am a beginner in this area so I hope for some support.

I get the following errors during installation:
error: library mach has Fortran sources but no Fortran compiler found
[end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed building wheel for scipy
Failed to build scipy
ERROR: Could not build wheels for scipy, which is required to install pyproject.toml-based projects

Hoping for some help.