[R] question about the tisPlot function in package tis

Gabor Grothendieck ggrothendieck at gmail.com
Tue Dec 2 20:35:27 CET 2008

The development version of zoo has a tis to zoo conversion function
that would allow you to plot your data using plot.zoo and xplot.zoo
in which case you can use classic graphics axis function (for plot.zoo)
or lattice facilities (with xyplot.zoo):

z <- as.zoo(dat, class = "yearmon")

There are many examples at ?plot.zoo and ?xyplot.zoo and
in the three zoo vignettes.

On Tue, Dec 2, 2008 at 1:49 PM,  <Kyle.Matoba at sf.frb.org> wrote:
> List,
> I am using the 'tisPlot' function in Jeff Hallman's excellent tis package
> and was hoping that someone could spare me from having to dig into the
> code of his 'tisPlot' function.  So far as I can tell, the preferred
> method of controlling the plotting of the x-axis is using the 'xTickFreq'
> and 'xTickSkip' options.  Unfortunately, the where the data ends up on the
> resultant plot is not invariant to this choice, as indicated in the
> documentation of the 'xTickFreq' option.  Has anyone adjusted the
> frequency of their x-axis label using this package before?  I imagine that
> there must be a better way of doing what I am trying to accomplish, but if
> not, does anyone have a suggestion on how to work around this without
> digging into the function itself?
> ## an example
> library(tis)
> strt <- ti(20000101, "monthly")
> dat  <- tis(runif(9*12 - 1), start=strt) # ends in 11/2008
> par(mfrow=c(2,1))
> tisPlot(dat, xTickFreq="monthly", xTickSkip=6) # graph ends in 11/2008,
> but looks to start some time in late 1999
> tisPlot(dat, xTickFreq="monthly", xTickSkip=12) # graph looks to end
> around 3/2009
> ## end
> TIA,
> Kyle
> ___________________________________________
> Research Associate, Macroeconomics
> Federal Reserve Bank of San Francisco
>        [[alternative HTML version deleted]]
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