[R] ggplot2 Y axis labels

[hadley wickham]

On Wed, Feb 18, 2009 at 4:21 PM, Felipe Carrillo
<mazatlanmexico at yahoo.com> wrote:
> Hi all:
> Using the example below, is there a way to add Y axis titles to each graphic instead of sharing the same title?

Not at the moment, no.  It's on my to do list.
Hadley

>
> library(ggplot2)
>
> RT = matrix(c(814, 500, 424, 394, 967, 574, 472, 446),4,2)
> colnames(RT) = c('repetition','alternation')
> rownames(RT) = c('7-yrs','11-yrs','15-yrs','21-yrs')
>
> rt <- melt(RT)
> names(rt) <- c("age", "trt", "value")
> rt$variable <- "rt"
>
> #this next block was missing in Hadley's previous example
> error = matrix(c(10,6,6,4,13,7,6,3),4,2)
> colnames(error) = c('repetition','alternation')
> rownames(error) = c('7-yrs','11-yrs','15-yrs','21-yrs')
>
> errors <- melt(error)
> names(errors) <- c("age", "trt", "value")
> errors$variable <- "error"
>
> df <- rbind(rt, errors)
>
> # Make sure factors are ordered correctly
> df$age <- factor(df$age, levels = c("7-yrs", "11-yrs", "15-yrs", "21-yrs"))
>
> # Which results in:
> structure(list(age = structure(c(1L, 2L, 3L, 4L, 1L, 2L, 3L,
> 4L, 1L, 2L, 3L, 4L, 1L, 2L, 3L, 4L), .Label = c("7-yrs", "11-yrs",
> "15-yrs", "21-yrs"), class = "factor"), trt = structure(c(2L,
> 2L, 2L, 2L, 1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 1L, 1L, 1L, 1L), .Label =
> c("alternation",
> "repetition"), class = "factor"), value = c(814, 500, 424, 394,
> 967, 574, 472, 446, 10, 6, 6, 4, 13, 7, 6, 3), variable = c("rt",
> "rt", "rt", "rt", "rt", "rt", "rt", "rt", "error", "error", "error",
> "error", "error", "error", "error", "error")), .Names = c("age",
> "trt", "value", "variable"), row.names = c(NA, 16L), class = "data.frame")
>
> # It's now straightforward to create recreate the plot with lines
> # or with bars:
>
> plot <- ggplot(df, aes(x=age, y=value, colour = trt, fill = trt)) +
> facet_grid(variable ~ . , scale = "free")
> plot + geom_bar(position = "dodge")  +   geom_line(aes(group = trt)) + geom_point()
>
> Felipe D. Carrillo
> Supervisory Fishery Biologist
> Department of the Interior
> US Fish & Wildlife Service
> California, USA
>
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>



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