GNUPlot Manual

58 gnuplot 4.0 36 SET-SHOW
36.8 Clabel
gnuplot will vary the linetype used for each contour level when clabel is set. When this option on (the
default), a legend labels each linestyle with the z level it represents. It is not possible at present to
separate the contour labels from the surface key.
Syntax:
set clabel {’’}
unset clabel
show clabel
The default for the format string is %8.3g, which gives three decimal places. This may produce poor
label alignment if the key is altered from its default configuration.
The first contour linetype, or only contour linetype when clabel is off, is the surface linetype +1; contour
points are the same style as surface points.
See also set contour (p. 61).
36.9 Clip
gnuplot can clip data points and lines that are near the boundaries of a graph.
Syntax:
set clip
unset clip
show clip
Three clip types for points and lines are supported by gnuplot: points, one, and two. One, two, or all
three clip types may be active for a single graph. Note that clipping of color filled quadrangles drawn by
pm3d maps and surfaces is not controlled by this command, but by set pm3d clip1in and set pm3d
clip4in.
The points clip type forces gnuplot to clip (actually, not plot at all) data points that fall within but
too close to the boundaries. This is done so that large symbols used for points will not extend outside
the boundary lines. Without clipping points near the boundaries, the plot may look bad. Adjusting the
x and y ranges may give similar results.
Setting the one clip type causes gnuplot to draw a line segment which has only one of its two endpoints
within the graph. Only the in-range portion of the line is drawn. The alternative is to not draw any
portion of the line segment.
Some lines may have both endpoints out of range, but pass through the graph. Setting the two clip-type
allows the visible portion of these lines to be drawn.
In no case is a line drawn outside the graph.
The defaults are noclip points, clip one, and noclip two.
To check the state of all forms of clipping, use
show clip
For backward compatibility with older versions, the following forms are also permitted:
set clip
unset clip
set clip is synonymous with set clip points; unset clip turns off all three types of clipping.
36.10 Cntrparam
set cntrparam controls the generation of contours and their smoothness for a contour plot.
contour displays current settings of cntrparam as well as contour.
Syntax:
show