[R] Plotting wind direction as arrows with precipitation

[DJ L]

Hello R users!

I am trying to create a time series in R with two variables, precipitation
and wind direction vs Date/Time.

I am looking for suggestions and maybe even sample code.

My workbook is called "Sandy" and has columns with Date/Time, Raindall_cm,
Wind Direction in both degree format (0-359) and in character form (N, NW,
S, SW, SE, E, NE, NW).

I have done some reading for it on stackoverflow and other sites but not
making head way.

I will be graphing with ggplot most likely and am a beginner in R, self
taught from books and online resources.

This is the code I have and a small peak into the data.

Sandy<-read.csv("Sandy.csv", header=TRUE, sep=",",stringsAsFactors=FALSE)
> head(Sandy)
      Deal1     Rainfall_cm    Wind_Direction1 Wind_Direction2
1 10/22/2012 0:00           0        296         W
2 10/22/2012 0:15           0        317        NW
3 10/22/2012 0:30           0        323        NW
4 10/22/2012 0:45           0        323        NW
5 10/22/2012 1:00           0        326        NW
6 10/22/2012 1:15           0        326        NW

> class(Sandy)
[1] "data.frame"

> str(Sandy)
'data.frame':   1832 obs. of  4 variables:
 $ Deal1         : chr  "10/22/2012 0:00" "10/22/2012 0:15" "10/22/2012
0:30" "10/22/2012 0:45" ...
 $ Rainfall_cm   : num  0 0 0 0 0 0 0 0 0 0 ...

 $ Wind_Direction: num 296 317  323   323  326  326

 $ Wind_Direction: chr  "W" "NW" "NW" "NW" ...

> require(ggplot2)
Loading required package: ggplot2

# this graph does the precipitation vs time graph, but not the wind

> ggplot(Sandy, aes(x = Deal1, y = Rainfall_cm, group = 1)) +
geom_line(stat = "identity")


Ideally I want it to have the precipitation graph vs time, then wind vs
time on the same graph. I would like the wind direction to be arrows
pointing in the designated direction (i.e. North points north).

Thank you!

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