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Box Plots of Observations 87
Figure 43.42: Output of the OBSBOX program.
SetLS (f)
Add least-squares or median lines, automatically, to every subsequent scatter or
observation plot. Use non-zero f to turn on the least-squares lines, 0 to turn them off.
The line will be drawn in line style 1 (solid line).
Note that this routine is also used by the Scientific Graphics Toolkit, so if you use both
toolkits together, you only need to call this one routine. By default, least-squares lines
are turned off.
AskLS (f)
The opposite of SetLS. Returns 1 for automatic least-squares lines, 0 otherwise.
SetConfBand (ci, ls)
Add confidence bands to every subsequent scatter or observation plot. These bands
show the confidence interval for the least-squares line, not for the data!
The bands are added at the ci confident interval in the ls line style. For example ci = .95
and ls = 3 gives dotted lines at the 95% confidence interval. Use ls = 0 to turn off the
confidence bands. By default, confidence bands are off.
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