scale_x_date

[V N]

I am getting an error when I run the following code in R2.15.0/ggplot2 0.9.1 and R2.14.2/ggplot2 0.9.1.  Runs fine in R2.14.1/ggplot2 0.8.9.

require(ggplot2)

timescale <- seq(as.Date("01/01/09","%m/%d/%y"), length.out=12, by=7) 

data.all <- data.frame( 

    id = c(rep('111',12),rep('222',12),rep('333',12)), 

    week=c(timescale,timescale,timescale), 

    value=c(rnorm(12,15,3),rnorm(12,30,5),rnorm(12,20,5))

)

p <- ggplot(data.all, aes(x=week, y=value, group=id, colour=id)) + 

    scale_x_date(format="%m/%d/%y", major="28 days", minor="7 days") + geom_line(size=1.05)

Error:

Error in continuous_scale(aesthetics, "date", identity, breaks = breaks,  : 

  unused argument(s) (format = "%m/%d/%y", major = "28 days", minor = "7 days")

Any help would be greatly appreciated.  Thanks.

[V N]

Never mind.  I just saw this document --  http://cloud.github.com/downloads/hadley/ggplot2/guide-col.pdf

[Dennis Murphy]

Hi:

Try this:

library('scales')

ggplot(data.all, aes(x=week, y=value, group=id, colour=id)) +

scale_x_date(breaks = date_breaks("28 days"),
labels = date_format ("%m/%d/%y"),
minor_breaks = "7 days") +
geom_line(size=1.05)

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