displays fields in a display window
defines a blanking viewport
deletes the blanking viewport
closes the graphics segment
deletes a graphics segment
draws a polyline
draws individual lines
draws a grid
includes a graphics segment
opens a graphics segment
draws pie slices
converts from polar to world coordinates
plots points
draws and fills a polygon
defines a viewport
pops the viewport
stacks the viewport
computes round numbers for labeling axes
writes multiple text strings with special fonts
sets attributes for a graphics segment
shows a graph
initializes the graphics system
deactivates the graphics system
finds the string length
places text horizontally on a graph
places text vertically on a graph
defines the data window
draws a horizontal axis
draws a vertical axis
produces scatter plots
opens a display window