CatPhan Regression - Runtime Warning

[crcrewso]

Error Message

/home/crcrewso/venv/pylinactest/lib64/python3.8/site-packages/numpy/core/fromnumeric.py:3334: RuntimeWarning: Mean of empty slice.
  return _methods._mean(a, axis=axis, dtype=dtype,
/home/crcrewso/venv/pylinactest/lib64/python3.8/site-packages/numpy/core/_methods.py:161: RuntimeWarning: invalid value encountered in double_scalars
  ret = ret.dtype.type(ret / rcount)
/home/crcrewso/venv/pylinactest/lib64/python3.8/site-packages/numpy/core/_methods.py:216: RuntimeWarning: Degrees of freedom <= 0 for slice
  ret = _var(a, axis=axis, dtype=dtype, out=out, ddof=ddof,
/home/crcrewso/venv/pylinactest/lib64/python3.8/site-packages/numpy/core/_methods.py:185: RuntimeWarning: invalid value encountered in true_divide
  arrmean = um.true_divide(
/home/crcrewso/venv/pylinactest/lib64/python3.8/site-packages/numpy/core/_methods.py:209: RuntimeWarning: invalid value encountered in double_scalars
  ret = ret.dtype.type(ret / rcount)

Describe the Bug
Warning from numpy about mean of empty slice

To Reproduce
Steps to reproduce the behavior:

1. Install master version of pylinac with currently listed dependancies
2. run CT analysis on Dataset
3. See error
4. Analysis continues with what appears to be accurate results

Expected behavior
No warning message

[jrkerns]

You can filter them (e.g. https://stackoverflow.com/questions/29347987/why-cant-i-suppress-numpy-warnings) or upgrade numpy.

[jrkerns]

See if Randy's fix removes these for you: #355.