[R] plotting a point graph with data in X-axis
Gabor Grothendieck
ggrothendieck at gmail.com
Wed May 9 03:37:07 CEST 2007
One other idea. If your dates are continguous, as they are here,
you might want to use a ts series for this. Using the same sim
as in my prior post:
> set.seed(1)
> x <- with(sim, ts(freq, start = c(my.year[1], my.month[1]), freq = 12))
> x
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2000 11 15 22 34 8 32 33 38
2001 21 2 7 6 20 40 35 13 18 23 9 17
2002 19 5 12 3 28 29 1 16 27 4 25 39
> plot(x)
On 5/8/07, Gabor Grothendieck <ggrothendieck at gmail.com> wrote:
> - use proper spacing to make it easier to read
> - start off with set.seed to make it reproducible
> - omit cbind and combine all the rep's into one rep in first line
> - make the date column a known date class (here "Date"),
>
>
> set.seed(1)
> sim <- data.frame(
> my.year = rep(2000:2002, c(8, 12, 12)),
> my.month = c(5:12, 1:12, 1:12),
> freq = sample(1:40, 32)
> )
> sim$date <- as.Date(paste(sim$my.year, sim$my.month, 1, sep = "-"))
> plot(freq ~ date, sim)
>
> On 5/8/07, Milton Cezar Ribeiro <milton_ruser at yahoo.com.br> wrote:
> > Dear all,
> >
> > I have two data frame, on with a complete list of my field survey with frequency data of a sample species. This data frame looks like:
> >
> >
> > simulation<-data.frame(cbind(my.year=c(rep(2000,8),rep(2001,12),rep(2002,12)),my.month=c(5:12,1:12,1:12)))
> > simulation$year.month<-paste(simulation$my.year,"_",ifelse(simulation$my.month>=10,simulation$my.month,paste("0",simulation$my.month,sep="")),sep="")
> > simulation$freq<-sample(1:40,32)
> > attach(simulation)
> > plot(year.month, freq)
> >
> > As you can see, I have a collumn with the year and month of my samples, and a freq variable with simulated data. I would like to plot this data but when I try to use the plot showed above, I get a error message.
> >
> > After bypass this problem, I would like add points in my graph with simulated data for only a random number of survey month, but I need that the full range of surveys be kept on the X-axis. Just to simulate a sample I am using:
> >
> > simulation.sample<-simulation[sample(1:length(year.month),8, replace=F),]
> > simulation.sample$freq<-sample(1:40,8)
> >
> > Any ideas?
> >
> > Kind regards
> >
> > Miltinho
> >
> > __________________________________________________
> >
> >
> > [[alternative HTML version deleted]]
> >
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> > and provide commented, minimal, self-contained, reproducible code.
> >
>
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