gnuplot documentation
gnuplot documentation
gnuplot documentation
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
52 <strong>gnuplot</strong> 4.3 48 3D (SURFACE) PLOTS<br />
The xyerrorlines style is only relevant to 2D data<br />
plots. xyerrorlines is like linespoints, except that<br />
horizontal and vertical error bars are also drawn. At<br />
each point (x,y), lines are drawn from (x,y-ydelta) to<br />
(x,y+ydelta) and from (x-xdelta,y) to (x+xdelta,y)<br />
or from (x,ylow) to (x,yhigh) and from (xlow,y)<br />
to (xhigh,y), depending upon the number of data<br />
columns provided. A tic mark is placed at the ends<br />
of the error bar (unless set bars is used — see<br />
set bars (p. 88) for details). Either 4 or 6 input<br />
columns are required.<br />
4 columns: x y xdelta ydelta<br />
6 columns: x y xlow xhigh ylow yhigh<br />
with xyerrorlines<br />
If data are provided in an unsupported mixed form, the using filter on the plot command should be<br />
used to set up the appropriate form. For example, if the data are of the form (x,y,xdelta,ylow,yhigh),<br />
then you can use<br />
plot ’data’ using 1:2:($1-$3):($1+$3):4:5 with xyerrorlines<br />
47 Yerrorlines<br />
The yerrorlines (or errorlines) style is only relevant<br />
to 2D data plots. yerrorlines is like linespoints,<br />
except that a vertical error line is also<br />
drawn. At each point (x,y), a line is drawn from<br />
(x,y-ydelta) to (x,y+ydelta) or from (x,ylow) to<br />
(x,yhigh), depending on how many data columns are<br />
provided. A tic mark is placed at the ends of the<br />
error bar (see set bars (p. 88) for details). Either<br />
3 or 4 input columns are required.<br />
3 columns: x y ydelta<br />
4 columns: x y ylow yhigh<br />
with yerrorlines<br />
See also<br />
errorbar demo.<br />
48 3D (surface) plots<br />
Surface plots are generated using the splot command<br />
rather than the plot command. The style<br />
with lines draws a surface made from a grid of<br />
lines. Solid surfaces can be drawn using the style<br />
with pm3d. Usually the surface is displayed at<br />
some arbitrary viewing angle, such that it clearly<br />
represents a 3D surface. In this case the X, Y, and<br />
Z axes are all visible in the plot. The illusion of 3D is<br />
enhanced by choosing hidden line removal or depthsorted<br />
surface elements. See hidden3d (p. 104)<br />
and the depthorder (p. 121) option of set pm3d<br />
(p. 118).<br />
Z axis<br />
3D surface plot with hidden line removal<br />
X axis<br />
Y axis
Change language