GNUPLOT
An Interactive Plotting Program
Thomas Williams & Colin Kelley
Version 4.0 organized by: Lars Hecking
Copyright (C) 1986 - 1993, 1998, 2004 Thomas Williams, Colin Kelley
Mailing list for comments: gnuplot-info@lists.sourceforge.net
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This manual was prepared by Dick Crawford
3 December 1998
Major contributors (alphabetic order):
Next: smooth, Previous: example_datafile, Up: data-file
The index keyword allows only some of the data sets in a multi-data-set file to be plotted.
Syntax:
plot 'file' index <m>{{:<n>}:<p>}
Data sets are separated by pairs of blank records. `index <m>` selects only set <m>; `index <m>:<n>` selects sets in the range <m> to <n>; and `index <m>:<n>:<p>` selects indices <m>, <m>+<p>, <m>+2<p>, etc., but stopping at <n>. Following C indexing, the index 0 is assigned to the first data set in the file. Specifying too large an index results in an error message. If index is not specified, all sets are plotted as a single data set.
Example:
plot 'file' index 4:5