Before the end of the program, always call <#544#>plend<#544#> (page #plend#545>)
to close any output plot file and to free up any memory that may
have been allocated.
For devices that have separate graphics
and text modes, <#360#>plend<#360#> always resets the device into text mode. If
it is required to switch between modes within a program, the functions
<#546#>plgra<#546#> (page #plgra#547>) and <#548#>pltext<#548#> (page #pltext#549>) set the device to graphics and text modes
respectively.
#./chapter2.tex#
#./chapter3.tex#