Dataset pairing

It could be useful to connect the PCP dataset with resuts data. Selecting sample points in the PCP should then select the corresponding samples in a separate results plot (typically, a plot with a time series).

Start by examining how the PCP dataset and the separate results plot, typically a time series, are represented and how sample-point selection is handled. Done means selecting sample points in the PCP also selects the corresponding samples in the results plot, but the issue does not name files, tests, or entry points to begin with.

Written by the indexing model from the issue text.