[Gnuplot-info] Piecewise constant plot

[Torquil M. S. <to...@gm...>]

Hello, can gnuplot draw a piecewise constant graph from a simple data file?

Here is an example: Let the data file be like the following:

0 0
1 1
2 2

Then I want a graph that is 0 on x \in [0,1), 1 on [1,2), and so on. Is 
that possible in gnuplot without modifying the data file?

I guess it is possible to run a complicated series of command to filter 
the data file as gnuplot reads it, but I'm would like to be able to do 
something along the lines of:

plot "data.txt" using 1:2 blabla

where "blabla" is some setting that specifies that gnuplot should use a 
piecewise constant "interpolation" between data points. In fact, one 
should also be able to specify if any vertical lines should be visible 
or not.

Right now I generate a modified data file to accomplish this (containing 
additional data points):

0 0
0.99 0
1 1
1.99 1
2 2

Best regards
Torquil Sørensen
Norway