[R] Stacked barplot of timeseries data
Achim Zeileis
Achim.Zeileis at wu-wien.ac.at
Wed Jun 4 01:47:50 CEST 2008
On Tue, 3 Jun 2008, Demetri S. Mouratis wrote:
> Hi,
>
> I'm trying to plot time-series data where each sample breaks down the
> percentage of CPU time spent in each of four states (usr, nice, sys, idle)
>
>
> 19:08:15 %usr %nice %sys %idle
> 19:08:16 5 0 10 86
> 19:08:17 17 0 14 69
> 19:08:18 5 0 8 87
> 19:08:19 10 0 10 81
> 19:08:20 3 0 7 90
> 19:08:21 4 0 8 88
> [on and on for many samples]
>
> The plot I'm aiming for would stack the first three states in a colored
> barplot, so you get a visual sense of how busy the system is over the course
> of the day, and which state the CPU is spending its time in. (I've done this
> as area charts as well).
>
> barplot() looked promising, but it wants to stack the columns instead of the
> rows.
>
> Anybody have a good solution for this?
The "zoo" package provides a barplot() method for "zoo" series.
Example with some artificial data:
library("zoo")
x <- matrix(runif(44), ncol = 4)
colnames(x) <- c("%usr", "%nice", "%sys", "%idle")
z <- zoo(x, Sys.time() - c(10:0))
barplot(z, legend = TRUE)
hth,
Z
> Thanks!
> ...Demetri
>
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