GNUPlot Manual

36 SET-SHOW gnuplot 4.0 99
36.57.6.19 Xerrorlines The xerrorlines style is only relevant to 2-d data plots. xerrorlines is
like linespoints, except that a horizontal error line is also drawn. At each point (x,y), a line is drawn
from (xlow,y) to (xhigh,y) or from (x-xdelta,y) to (x+xdelta,y), depending on how many data columns
are provided. A tic mark is placed at the ends of the error bar (unless set bars is used — see set bars
(p. 55) for details).
36.57.6.20 Xyerrorlines The xyerrorlines style is only relevant to 2-d data plots. xyerrorlines
is like linespoints, except that horizontal and vertical error bars are also drawn. At each point (x,y),
lines are drawn from (x,y-ydelta) to (x,y+ydelta) and from (x-xdelta,y) to (x+xdelta,y) or from (x,ylow)
to (x,yhigh) and from (xlow,y) to (xhigh,y), depending upon the number of data columns provided. A
tic mark is placed at the ends of the error bar (unless set bars is used — see set bars (p. 55) for
details).
If data are provided in an unsupported mixed form, the using filter on the plot command should be
used to set up the appropriate form. For example, if the data are of the form (x,y,xdelta,ylow,yhigh),
then you can use
plot ’data’ using 1:2:($1-$3):($1+$3):4:5 with xyerrorlines
36.57.6.21 Yerrorlines The yerrorlines (or errorlines) style is only relevant to 2-d data plots.
yerrorlines is like linespoints, except that a vertical error line is also drawn. At each point (x,y), a
line is drawn from (x,y-ydelta) to (x,y+ydelta) or from (x,ylow) to (x,yhigh), depending on how many
data columns are provided. A tic mark is placed at the ends of the error bar (unless set bars is used
— see set bars (p. 55) for details). See also
errorbar demo.
36.58 Surface
The command set surface controls the display of surfaces by splot.
Syntax:
set surface
unset surface
show surface
The surface is drawn with the style specified by with, or else the appropriate style, data or function.
Whenever unset surface is issued, splot will not draw points or lines corresponding to the function
or data file points. Contours may still be drawn on the surface, depending on the set contour option.
unset surface; set contour base is useful for displaying contours on the grid base. See also set
contour (p. 61).
36.59 Terminal
gnuplot supports many different graphics devices. Use set terminal to tell gnuplot what kind of
output to generate. Use set output to redirect that output to a file or device.
Syntax:
set terminal { | push | pop}
show terminal
If is omitted, gnuplot will list the available terminal types. may be
abbreviated.
If both set terminal and set output are used together, it is safest to give set terminal first, because
some terminals set a flag which is needed in some operating systems.
Several terminals have additional options. For example, see dumb (p. 107), iris4d (p. 116), hpljii
(p. 115) or postscript (p. 126). The options used by a previous invocation set term