Either or both numbers may be omitted to avoid affecting the current default. The first number specifies the range to begin and the second specifies the end. If we wanted to change the range in only one plot, a range can be specified before the first function being plotted. Advanced Gnuplot Three dimensional surfaces can be generated with the splot command, which has syntax almost identical to plot. A parametric function is one in which both the x and y coordinates are functions of a third variable, which in Gnuplot is t.
Parametric plots are also valid while doing a three-dimensional splot.
In this case, the independent variables under gnuplot are u and v. Gnuplot can also take data points from the standard output of a Unix command specified on gnuplot's command line. This allows the display of points generated from almost any source. Xmgr Xmgr is oriented more towards plotting data created from an external source, as opposed to plotting a given mathematical function. Xmgr normally reads files, but can also take input piped from its standard input. Once data has been read into an xmgr set, it can be displayed, scaled, and manipulated in many ways.