Feature: Impulsive metrics (kurtosis and energy windowed SPL RMS)

[caplinje-NOAA]

Hello,

Finally ready to submit this, the changes can be summarized as:

• added kurtosis (in utils, signal, acoustic_file, and units) Add kurtosis #106
• added energy windowing method to utils
• added option for energy window computation of rms
• added implusive flag to _event.analyze which calculates all impulsive related metrics
• made a small modification to path handling for testing (was necessary in my IDE to run tests)
• made some improvements to docstrings

In terms of new math, the primary things are the kurtosis and energy window calculations. For kurtosis, I explored the best implementation and documented it here. For the energy window calculation, I followed the standard method from the most often cited reference. In both cases I added tests which compare against known/expected results for each. Additionally, I built a comprehensive test of all of the new metrics using some example pile driving acoustic data and previously analyzed results.

In terms of testing, everything is passing with the exception of TestPlots.test_summary_plot and TestDataset.test_generate_dataset.

Here are the two exceptions from the failed tests:

tests\test_dataset.py:66 (TestDataset.test_generate_dataset)
self = <tests.test_dataset.TestDataset testMethod=test_generate_dataset>

>           raise FileNotFoundError('The path %s does not exist. Please choose another one.' % folder_path)
E           FileNotFoundError: The path tests/test_data does not exist. Please choose another one.

..\pypam\acoustic_survey.py:511: FileNotFoundError


================ 2 failed, 50 deselected, 3 warnings in 14.07s ================
FAILED                       [100%]
tests\test_plots.py:78 (TestPlots.test_summary_plot)
self = <tests.test_plots.TestPlots testMethod=test_summary_plot>

        if location is not None:
            if pvlib is None:
>               raise Exception('To use this feature it is necessary to install pvlib ')
E               Exception: To use this feature it is necessary to install pvlib

..\pypam\plots.py:382: Exception

Please let me know if you would like me to split any of this out and submit separate pull requests, as I am realizing this might be a lot for a single pull request. For example, if you are only interested in including kurtosis, I would definitely understand, as many of my edits specifically relate to performing analysis of anthro impulsive sources.

Again, it was been really fun to work with and learn this package, thanks!

[caplinje-NOAA]

Small update here: after adding the optional dependencies, all tests pass.

[caplinje-NOAA]

Apologies for the messy commit history, and I should note that this branch also contains the bin overlap fix related to #127. Again, if you want me to more clearly separate out all of these changes, please let me know and I can submit pull requests from simpler/cleaner branches.

[cparcerisas]

Hi, no worries! Thank you so much for all the nice work, it looks great! I am now busy with some other work but I will definitely check it out in in two weeks :) Sorry for the delay.

[caplinje-NOAA]

Absolutely no rush on my end - happy to work through this whenever it makes sense. Thanks!