Next: High-Level Plotting, Up: Plotting

### 15.1 Introduction to Plotting

Earlier versions of Octave provided plotting through the use of gnuplot. This capability is still available. But, a newer plotting capability is provided by access to OpenGL. Which plotting system is used is controlled by the `graphics_toolkit` function. (See Graphics Toolkits.)

The function call `graphics_toolkit ("fltk")` selects the FLTK/OpenGL system, and `graphics_toolkit ("gnuplot")` selects the gnuplot system. The two systems may be used selectively through the use of the `graphics_toolkit` property of the graphics handle for each figure. This is explained in Graphics Data Structures.