error plotting when spectrum has gaps (zero value error)

[shimwell]

overly aggressive weight windows can cause the spectrum to have gaps. While this is not ideal the package should properly handle this without crashing.

• add test case to mimic gappy spectrum and reproduce error
• add solution to handle gappy spectrum

[shimwell]

File "/home/spectrum_plotter/spectrum_plotter/core.py", line 319, in add_spectra_to_plot
    y=y + y_err,
UnboundLocalError: local variable 'y_err' referenced before assignment

[py1sl]

not sure this is a gappy spectrum issue, the error was for plotly not having a if len(spectra=3) around the traces for the std dev.
might be gappy spectra + log scale will cause an issue

[shimwell]

Yes that sounds familiar, the spectrum had gaps it it which I guess were either 0 or NaN values. Thanks for figuring that out.