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From: bryan <bryanlepore@gmail.com>
Newsgroups: comp.graphics.apps.gnuplot
Subject: time format and xrange or missing data "."
Date: Tue, 15 May 2012 10:15:42 -0700 (PDT)
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Xref: csiph.com comp.graphics.apps.gnuplot:1111

[ gnuplot 4.6 patchlevel 0 ]

trying to understand use of 'set xdata time' vis-a-vis the following points=
:

I would like to set xrange longer than the available data. I used a "." to =
mark missing data points. I can plot the first field (see below) using a co=
nventional x/y data setup and various xranges (not shown). however when usi=
ng 'set xdata time' it appears that this will not work. Note that I have th=
e date in field 2, but this shouldn't matter I think. here are the commands=
:

gnuplot> set xdata time ; set timefmt '%m-%Y' ; set format x '%b'
gnuplot> plot 'data.dat' u 2:1 w lp

( ... looks OK ...)
           =20
gnuplot> set xrange [0:14]=20
gnuplot> replot          =20
gnuplot> plot 'data.dat' u 2:1 w lp                                        =
        =20
         all points y value undefined!
gnuplot> show xrange

	set xdata time
	set xrange [ * : * ] noreverse nowriteback  # (currently ["10-2011":"05-20=
12"] )

data.dat:

8.38  11-2011=20
1.58  12-2011=20
3.13  01-2012=20
9.74  02-2012=20
2.78  03-2012=20
6.51  04-2012=20
4.43  05-2012=20
 .    06-2012
 .    07-2012
 .    08-2012
 .    09-2012
 .    10-2012
 .    11-2012
 .    12-2012

-Bryan