There are a number of tasks that display on a PGPLOT device. These devices include, of course, postscript disk files that you can spool to a laser printer (see Chapter 3 for details of how to use PGPLOT). For image display, there is a suite of tasks called cginit, cgdisp, cgcurs, cgslice, and cgspec. We will discuss the first four in this chapter, and cgspec in Chapter 19.
CG' tasks attempt to label the plots in the correct non-linear
axes. Provided the field is not too large, the labelling is good (use
options=grid to see the non-linearities more clearly). However for
for very large fields or where the non-linearity is particularly severe (e.g.
south celestial pole), the `
CG' tasks will fail to label adequately.