Pergunta
How to create a spiral graph in R? Is there any package for this kind of analysis? Or is there any other way to visualize time oriented data (regarding periodicity)?
Solução
For examining periodicity, cycle plots (pdf) work well. There are also many, many functions for analysing periodicity in time series. Start with stl
and periodicity
in the xts
package.
Using ggplot2
, you can create a spiral graph like this:
library(ggplot2)
data(beavers)
p <- ggplot(beaver1, aes(time, temp, colour = day)) +
geom_line() +
coord_polar(theta = "x")
p
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