List the variables used in a given display
# S3 method for GGobiDisplay
variables(x)GGobiDisplay object
There are three types of variables in GGobi displays: X, Y, Z, which correspond to the labels on the toggle buttons in GGobi. Most plots have a constrained set of possible options. For example, in tours you can only set X variables, and you must have at least three. Or in the rotation plot, you need exactly one X, Y, and Z variable. You can figure out what these conditions are by using the toggle buttons in GGobi.
variables<-.GGobiDisplay for examples