Lets' take this as the data file:
2012-06-01, 01:00, 1
2012-06-01, 02:00, 2
2012-06-01, 03:00, 4
2012-06-01, 04:00, 3
...
2012-06-02, 01:00, 5
2012-06-02, 02:00, 2
2012-06-02, 03:00, 1
2012-06-02, 04:00, 1
...
I know how to set timefmt
and xdata
to plot time series when date and time are represented with a single field, but how to plot this with GnuPlot when time and date are stored in separate columns?