## 1.8.2 Selecting which axes to plot against

The axes against which data are plotted can be selected by passing the `axes` modifier to the `plot` command. By default, data is plotted against the first horizontal axis and the first vertical axis. In the following `plot` command the second horizontal axis and the third vertical axis would be used:

    plot f(x) axes x2y3

It is also possible to plot data using a vertical axis as the abscissa axis using syntax such as:

    plot f(x) axes y3x2

Similar syntax is used when plotting three-dimensional graphs, except that three perpendicular axes should be specified.