alt_analysis issue

[Randa-Almadhoun]

I tried reading data from csv file and use function alt_analysis, but I get an error in the analysis code related to the index of the data. the error message is as follows:

/home/kuri/anaconda3/lib/python3.6/site-packages/px4tools/analysis.py in alt_analysis(data, min_alt, max_alt)
    107         pass
    108     (-1*data.LPSP_Z).plot(legend=True)
--> 109     (data.SENS_BaroAlt - data.SENS_BaroAlt[i0_Baro].values[0]).plot(legend=True)
    110     (data.GPS_Alt - data.GPS_Alt[i0_GPS].values[0]).plot(legend=True)
    111     (-1*data).LPOS_Z.plot(legend=True)
AttributeError: 'numpy.float64' object has no attribute 'values'

I modified alt_analysis function in analysis.py by removing the [i0_GPS] & [i0_Baro] since each of the GPS_Alt, and SENS_BaroAlt is field by itself in the csv file and it is np array that could be accessed using values. Also, printing i0_Baro = data.SENS_BaroAlt.first_valid_index() doesn't return the correct first valid index so I had to find the first correct index. I also modified mapping in the same way since it also complained about the index index 0 is out of bounds for axis 0 with size 0...

The changes that were done could be found in the following links:
analysis.py
mapping.py

After these modifications, the plots were generated,
but I would like to verify these modifications or know if this issue appears to others or did it happen because of the log that was used ??