.BG
.FN tsplot
.FN tslines
.FN tspoints
.TL
Plot Multiple Time-Series
.CS
tsplot(..., type="l", lty=1:5, pch, col=1:4, log="")
tspoints(..., type="p", lty=1:5, pch, col=1:4)
tslines(..., type="l", lty=1:5, pch, col=1:4)
.AG ...
any number of
time-series to be plotted.  The x-axis is set up as the
union of the times spanned by the series.  The y-axis
includes the range of all the series. 
.NA
.AG type
an optional character string, telling which type of plot
(points, lines, both, none or high-density) should be done
for each plot.  The first character of type defines the
first plot, the second character the second, etc.  Elements
of type are used cyclically; e.g., "pl" alternately plots
points and lines. 
.AG lty
optional vector of line types.  The first element is the
line type for the first line, etc.  Line types will
be used cyclically until all plots are drawn.
.AG pch
optional character vector for plotting characters.
The first character is the plotting
character for the first plot of type "p", the second for the
second, etc.  Default is the digits (1 through 9, 0) then
the lower case letters.
.AG col
optional vector of colors.  Colors are also used cyclically.
.AG log
the value "y" can be given to 
cause the y-axis to be plotted on a logarithmic scale.
By default, the y-axis is not logarithmic.
.PP
Function `tsplot' generates a new plot; `tspoints' and `tslines' add to the
current plot.
.GR
.Tl
.EX
tsplot(gnp,smooth(gnp),type="pl")
tspoints(x,y,pch="*") # points with "*" for both series
# the example plot is produced by:
tsplot(hstart,smooth(hstart),type="pl")
title(main="Housing Starts",sub="Data and Smoothed Values")
.PI
.KW ts
.KW hplot
.KW aplot
.WR
