How do I index n sets of 4 columns to plot multiple plots using matplotlib?

Well if you like R's data. Table, there have been a few (at least) attempts to re-create that functionality in NumPy--through additional classes in NumPy Core and through external Python libraries. The effort I find most promising is the datarray library by Fernando Perez.

Here's how it works.

You could put your data into a dict for each borehole, keyed by the borehole id, and values as dicts with headers as keys. Roughly like this.

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