Set columnhead as Title in Gnuplot

Question

I'm logging data and I want to periodically send plots of the logged data (temperature and humidity) via mail. The plot should cover the data from last week. What I would like to do is automatically generate a Plot Title that includes the Dates shown in the Plot. So a simple title like:

Week 01.01.2016 - 08.01.2016 would be great.

I am thinking about creating a .csv file with the data like this

2016-01-01 00:01      20.0           40.0
2016-01-01 00:02      20.0           40.0

but add the First and the Last Date at the beginning of the file in the first row so that the .csv file reads like this:

2016-01-01 - 2016-01-08
2016-01-01 00:01      20.0           40.0
2016-01-01 00:02      20.0           40.0

Can I tell gnuplot to simply take the first Line as Plot Titel? something as simple as set title columnhead would be great

ewcz ewcz · Accepted Answer · 2016-09-19T19:41:34

assuming that the first line of your data file contains the title, one could proceed as:

set title "`head -n1 test.dat`"
plot "<tail -n+2 test.dat" u 1:2 w lp, '' u 1:3 w lp

Here, the first command extracts the first line and uses it as the title, while the second command plots the remaining lines from the input file...

Set columnhead as Title in Gnuplot

1 Answers