R help - Dec 2009 - Moving Averages in ggplot2

Hello all,

Have some time series data stored in a data.frame, and am plotting it with
ggplot2 (which is totally awesome).  I have explored the documentation and
mailing list archives, and I can't see any way to plot a 'smoother'
that is
just the K-step moving average.

For example, imagine I had a data.frame called 'sleep' with
'date' as the
date (from as.Date()) and 'hours' as the # hours I slept that night, I
would
love to do something like:

qplot(date, hours, data = sleep) + stat_smooth(method = 'movingaverage',
k 7);

does such a thing exist?  If not, I know the package is extensible, so any
guidance as to how make it to do so would be very much appreciated.

Thanks,
Mike
-- 
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You probably want to use a time series package for this.   There are
plotting facilities specifically aimed at time series in zoo, xts,
quantmod, timeSeries and latticeExtra.  We illustrate with zoo which
has classic graphics and lattice graphics methods:

devAskNewPage(TRUE)
library(zoo)
set.seed(123)
z <- zoo(rnorm(100), Sys.Date() - 100:0)

plot(cbind(z, rollmean(z, 10)), screen = 1, col = 1:2)

library(lattice)
xyplot(cbind(z, rollmean(z, 10)), screen = 1, col = 1:2)

If you want the raw and the smooth in different panels omit screen 1.  See
?plot.zoo, ?xyplot.zoo, ?rollmean and the three vignettes that
come with zoo.


On Thu, Dec 10, 2009 at 2:15 PM, fruminator <michael at frumin.net>
wrote:
>
> Hello all,
>
> Have some time series data stored in a data.frame, and am plotting it with
> ggplot2 (which is totally awesome). ?I have explored the documentation and
> mailing list archives, and I can't see any way to plot a
'smoother' that is
> just the K-step moving average.
>
> For example, imagine I had a data.frame called 'sleep' with
'date' as the
> date (from as.Date()) and 'hours' as the # hours I slept that
night, I would
> love to do something like:
>
> qplot(date, hours, data = sleep) + stat_smooth(method =
'movingaverage', k > 7);
>
> does such a thing exist? ?If not, I know the package is extensible, so any
> guidance as to how make it to do so would be very much appreciated.
>
> Thanks,
> Mike
> --
> View this message in context:
http://n4.nabble.com/Moving-Averages-in-ggplot2-tp958867p958867.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
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> PLEASE do read the posting guide
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>