Conversion string column into numeric column to plot in GNUPLOT

Question

I have a data file which contains 2 columns like these:

2016-05-23, True
2016-05-24, True
2016-05-25, False
2016-05-26, True
2016-05-27, False
2016-05-28, False
2016-05-29, True

I would like to know how to plot the 2nd column with GNUPLOT. True is 1 and False is 0... I have been searching on the web but I did not find a solution for this case.

Thanks in advance.

Jack Glasshard · Accepted Answer · 2016-08-10 14:56:41Z

3

Is this what you need?

set xdata time
set timefmt "%Y-%m-%d"
set format x "%Y-%m-%d"
f(x) = x eq "True" ? 1:0
plot 'data.txt' u 1:(f(strcol(2))) w lp

This will use f(x) to convert True/False into 1/0 values. The rest is simply date formatting.

answered Aug 10, 2016 at 14:56

Jack Glasshard

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