The fftfit from astrogewgaw

Error on installation

fftfit fails to install on my own machine, giving the following error:

pip's output (click to collapse):

Processing /run/media/ujjwal/codex/codes/python/fftfit
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error
  
  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [23 lines of output]
      Traceback (most recent call last):
        File "/home/ujjwal/conda/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 363, in <module>
          main()
        File "/home/ujjwal/conda/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 345, in main
          json_out['return_val'] = hook(**hook_input['kwargs'])
        File "/home/ujjwal/conda/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 130, in get_requires_for_build_wheel
          return hook(config_settings)
        File "/tmp/pip-build-env-ufahow3h/overlay/lib/python3.9/site-packages/setuptools/build_meta.py", line 338, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=['wheel'])
        File "/tmp/pip-build-env-ufahow3h/overlay/lib/python3.9/site-packages/setuptools/build_meta.py", line 320, in _get_build_requires
          self.run_setup()
        File "/tmp/pip-build-env-ufahow3h/overlay/lib/python3.9/site-packages/setuptools/build_meta.py", line 483, in run_setup
          super(_BuildMetaLegacyBackend,
        File "/tmp/pip-build-env-ufahow3h/overlay/lib/python3.9/site-packages/setuptools/build_meta.py", line 335, in run_setup
          exec(code, locals())
        File "<string>", line 1, in <module>
        File "/tmp/pip-build-env-ufahow3h/overlay/lib/python3.9/site-packages/numpy/distutils/__init__.py", line 26, in <module>
          from . import ccompiler
        File "/tmp/pip-build-env-ufahow3h/overlay/lib/python3.9/site-packages/numpy/distutils/ccompiler.py", line 20, in <module>
          from numpy.distutils import log
        File "/tmp/pip-build-env-ufahow3h/overlay/lib/python3.9/site-packages/numpy/distutils/log.py", line 4, in <module>
          from distutils.log import Log as old_Log
      ImportError: cannot import name 'Log' from 'distutils.log' (/tmp/pip-build-env-ufahow3h/overlay/lib/python3.9/site-packages/setuptools/_distutils/log.py)
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.

Results all zero/inf

@astrogewgaw thanks for this work, it's extremely useful!

However, it is not working as expected, and fails in a seemingly simple case. Here is a minimal working example:

In [1]: from fftfit import fftfit
    ...: import numpy as np
    ...: import matplotlib.pyplot as plt
    ...: plt.ion()
    ...: template = 100 *(1 + 0.2 * np.sin(2 * np.pi * np.arange(0, 1, 0.001)))
    ...: prof = np.roll(np.random.poisson(template), 100)
    ...: plt.plot(prof, label="Profile"), plt.plot(template, label="Template")
    ...: plt.xlabel("Nbin")
    ...: plt.ylabel("Counts")
    ...: plt.legend()
    ...: fftfit(prof, template)
Out[11]: (0.0, 999.0, 0.0, 0.0, -inf, 0.0, 2)

Sometimes, it gives more reasonable numbers, but it mostly fails this way.

I'm on a Mac with M1max processor, Python 3.9, numpy 1.23.1
Hope this helps!

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