Opening a CSV File With Duplicate Header Entries Makes PlotJuggler Crash

[Bartimaeus-]

Attempting to open a csv file that contains two or more header entries with the same contents causes PlotJuggler to crash without warning

Example header:
timestamp,A,A,C,D

Attached is the command line output when PlotJuggler crashes:

PlotJuggler_CSV_MultipleHeader_Crash_Print_Outputs.txt

Having PlotJuggler check the header for duplicate entries and either aborting the file load with an informational message or appending a sequential number to the end of the duplicate entries to make them unique would be great.

Having non-unique header entries in a csv is definitely not good practice, in this case the csv file that caused this issue was generated from a data analysis software that was exporting separate time columns for each data series:

Time,Data1,Time,Data2,Time,Data3

Multiple time axis from the same csv is definitely not a format that PlotJuggler currently supports, the intent was to ignore the time columns and use the row number as the time axis.

[facontidavide]

Nice catch. I will fix it soon.

The correct behavior is, in my opinion, to simply forbid column with identical names (and stop loading such files).

In the example you provided Time,Data1,Time,Data2,Time,Data3, an option could be to append some automatic suffix to identical columns, but i don't think plotjuggler should handle this.

[facontidavide]