We have already encountered some graphics in the previous chapters of this book, both text plots and two-dimensional graphics using modules such as ASCIIPlots and Winston. In this section, we are going to look a little further into these and similar packages.
In Chapter 1, The Julia Environment, we had seen some simple graphics using the ASCII plots package.
This has largely been replaced with a second package, the TextPlots package. While it does not provide sophisticated visualization, it is worth a look as it is very lightweight and loads quickly, being independent of any graphic libraries or drivers.
The basic call uses a function of a single variable together with an optional range of values for that variable.
The range can be specified in the x0:x1 form or as separate arguments (,,,.x0,x1). If no range is provided, then a default of -10:10 is used.
It is possible to define more than one function, but the display can be confusing.
Consider the following...