gnuplot documentation

49 CD gnuplot 4.3 53
The splot command can also calculate and draw
contour lines corresponding to constant Z values.
These contour lines may be drawn onto the surface
itself, or projected onto the XY plane. See set contour
(p. 94).
3D surface with projected contours
Z axis
X axis
Y axis
An important special case of the splot command
is to map the Z coordinate onto a 2D surface by
projecting the plot along the Z axis. See set view
map (p. 139). This plot mode can be used to
generate contour plots and heat maps.
Y axis
projected contours using 'set view map'
Part III
Commands
X axis
This section lists the commands acceptable to gnuplot in alphabetical order. Printed versions of this
document contain all commands; on-line versions may not be complete. Indeed, on some systems there
may be no commands at all listed under this heading.
Note that in most cases unambiguous abbreviations for command names and their options are permissible,
i.e., "p f(x) w li" instead of "plot f(x) with lines".
In the syntax descriptions, braces ({}) denote optional arguments and a vertical bar (|) separates mutually
exclusive choices.
49 Cd
The cd command changes the working directory.
Syntax:
cd ’’
The directory name must be enclosed in quotes.
Examples:
cd ’subdir’
cd ".."
It is recommended for DOS and Windows users to use single-quotes — backslash [\] has special significance
inside double-quotes and has to be escaped. For example,
fails, but
cd "c:\newdata"
cd ’c:\newdata’
cd "c:\\newdata"
works as expected.