GNUPlot Manual
GNUPlot Manual
GNUPlot Manual
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36 SET-SHOW gnuplot 4.0 71<br />
the edge CB above wouldn’t be drawn at all, normally, making the resulting display hard to understand.<br />
Therefore, the default option of bentover will turn it visible in this case. If you don’t want that, you<br />
may choose nobentover instead. See also<br />
and<br />
hidden line removal demo (hidden.dem)<br />
complex hidden line demo (singulr.dem).<br />
36.26 Historysize<br />
Note: the command set historysize is only available when compiled with the gnu readline.<br />
Syntax:<br />
set historysize <br />
unset historysize<br />
When leaving gnuplot, the value of historysize is used for truncating the history to at most that much<br />
lines. The default is 500. unset historysize will disable history truncation and thus allow an infinite<br />
number of lines to be written to the history file.<br />
36.27 Isosamples<br />
The isoline density (grid) for plotting functions as surfaces may be changed by the set isosamples<br />
command.<br />
Syntax:<br />
set isosamples {,}<br />
show isosamples<br />
Each function surface plot will have iso-u lines and iso-v lines. If you only specify<br />
, will be set to the same value as . By default, sampling is set to 10 isolines<br />
per u or v axis. A higher sampling rate will produce more accurate plots, but will take longer. These<br />
parameters have no effect on data file plotting.<br />
An isoline is a curve parameterized by one of the surface parameters while the other surface parameter is<br />
fixed. Isolines provide a simple means to display a surface. By fixing the u parameter of surface s(u,v),<br />
the iso-u lines of the form c(v) = s(u0,v) are produced, and by fixing the v parameter, the iso-v lines of<br />
the form c(u) = s(u,v0) are produced.<br />
When a function surface plot is being done without the removal of hidden lines, set samples controls<br />
the number of points sampled along each isoline; see set samples (p. 90) and set hidden3d<br />
(p. 69). The contour algorithm assumes that a function sample occurs at each isoline intersection, so<br />
change in samples as well as isosamples may be desired when changing the resolution of a function<br />
surface/contour.<br />
36.28 Key<br />
The set key enables a key (or legend) describing plots on a plot.<br />
The contents of the key, i.e., the names given to each plotted data set and function and samples of<br />
the lines and/or symbols used to represent them, are determined by the title and with options of the<br />
{s}plot command. Please see plot title (p. 47) and plot with (p. 47) for more information.<br />
Syntax:<br />
set key {on|off} {default}<br />
{left | right | top | bottom | outside | below | }<br />
{Left | Right} {{no}reverse}<br />
{samplen } {spacing }<br />
{width }