Redraw Graphics and Change Graphics Terminal State

DESCRIPTION:

Redraws the current graph or switchs to text or graphics mode, under certain graphics devices.

USAGE:

redraw() 
textmode() 
graphicsmode() 

SIDE EFFECTS:

redraw enters graphics mode and redisplays the current graph.

textmode puts your terminal into text mode.

graphicsmode puts the terminal into graphics mode. On some terminals switching from graphics to text erases the picture from the terminal's memory; in this case you want to use redraw instead of graphicsmode---it puts the terminal into graphics mode and redraws the picture that was on the graphics screen.

DETAILS:

When you enter graphics mode, the text will often be erased from memory; we have no way to restore that.

Some graphics terminals can display either text or graphics but not both at the same time. Most Tektronix emulators are like this---an editor can only be used while in ASCII terminal mode and pictures can only be drawn while in graphics mode.

SEE ALSO:

.

EXAMPLES:

tsplot(hstart) 
# now inspect the numbers in hstart  
hstart 
# now add the trend line to the last plot  
# which is now cluttered with numbers so redraw it 
redraw() 
abline(lsfit(time(hstart), hstart))