GNUPlot Manual

146 gnuplot 4.0 36 SET-SHOW
36.73 X2data
The set x2data command sets data on the x2 (top) axis to timeseries (dates/times). Please see set
xdata (p. 146).
36.74 X2dtics
The set x2dtics command changes tics on the x2 (top) axis to days of the week. Please see set xdtics
(p. 147) for details.
36.75 X2label
The set x2label command sets the label for the x2 (top) axis. Please see set xlabel (p. 147).
36.76 X2mtics
The set x2mtics command changes tics on the x2 (top) axis to months of the year. Please see set
xmtics (p. 148) for details.
36.77 X2range
The set x2range command sets the horizontal range that will be displayed on the x2 (top) axis. Please
see set xrange (p. 148) for details.
36.78 X2tics
The set x2tics command controls major (labelled) tics on the x2 (top) axis.
(p. 149) for details.
Please see set xtics
36.79 X2zeroaxis
The set x2zeroaxis command draws a line at the origin of the x2 (top) axis (y2 = 0). For details,
please see set zeroaxis (p. 153).
36.80 Xdata
This command sets the datatype on the x axis to time/date. A similar command does the same thing
for each of the other axes.
Syntax:
set xdata {time}
show xdata
The same syntax applies to ydata, zdata, x2data, y2data and cbdata.
The time option signals that the datatype is indeed time/date.
datatype reverts to normal.
If the option is not specified, the
See set timefmt (p. 143) to tell gnuplot how to read date or time data. The time/date is converted
to seconds from start of the century. There is currently only one timefmt, which implies that all the
time/date columns must conform to this format. Specification of ranges should be supplied as quoted
strings according to this format to avoid interpretation of the time/date as an expression.
The function ’strftime’ (type "man strftime" on unix to look it up) is used to print tic-mark labels.
gnuplot tries to figure out a reasonable format for this unless the set format x "string" has supplied
something that does not look like a decimal format (more than one ’%’ or neither %f nor %g).