## 1.52.74 urange

    set urange [ <range> ] [reverse]

The `set urange` command changes the range of the free parameter `u` used when generating parametric plots sampled over grids of (`u`,`v`) values. For more details of the syntax of the range specifier, see the `set xrange` command. Note that `u` is not allowed to autoscale, and so the `*` character is not permitted in the specified range.

Specifying the `set urange` command by itself specified that parametric plots should be sampled over two-dimensional grids of (`u`,`v`) values, rather than one-dimensional ranges of `t` values.