Hi:

I'm not sure what you mean by line weight - I interpreted it to mean size,
but you already have have it in your geom_line() call. If you want thicker
lines, increase size. As for the others, try this:

ggplot(ddata, aes(x = area, y = disc, colour = year)) +
    geom_point() + geom_line(aes(group = year), size = 1) +
    scale_y_continuous(name='Percent Well Prepared', limits=c(0, 100)) +
    scale_colour_discrete('Year') + xlab('') +
    opts(axis.text.x = theme_text(size = 16)) +
    opts(axis.text.y = theme_text(size = 16)) +
    opts(legend.title = theme_text(size = 12, hjust = 0)) +
    opts(legend.text = theme_text(size = 12))

Brandon Hurr has taken the time to organize a nice wiki to illustrate how to
use different sets of opts():
https://github.com/hadley/ggplot2/wiki/+opts%28%29-List

Click on the 'Usage Examples' link under the subsection title to get to the
good stuff.

Thank you for providing a data frame in dput() form - it simplified matters
greatly!

HTH,
Dennis

On Thu, Jan 6, 2011 at 11:20 AM, Art Burke <Art.Burke@educationnorthwest.org
> wrote:

> Given the data structure below and the call to ggplot2, how can I increase
> the size of the axis scale points, the line weight, and the size of the
> legend?
>
> ddata <-structure(list(year = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 1L,
>  2L, 2L, 2L, 2L, 2L, 2L, 2L), .Label = c("2003", "2007"), class =
> "factor"),
>  area = structure(c(7L, 6L, 1L, 2L, 3L, 4L, 5L, 7L, 6L, 1L,
>  2L, 3L, 4L, 5L), .Label = c("AK", "ID", "MT", "OR", "WA",
>  "NW", "US"), class = "factor"), disc = c(55.8, 62.6, 54.3,
>  56.9, 52.8, 66.7, 64.8, 59.5, 64.8, 65.8, 61.4, 60.6, 66.3,
>  65.5)), .Names = c("year", "area", "disc"), class = "data.frame",
> row.names = c(NA,
>  14L))
>
> ggplot(ddata, aes(x = area, y = disc, colour = year)) +
>     geom_point() + geom_line(aes(group = year), size = 1) +
>     scale_y_continuous(name='Percent Well Prepared', limits=c(0, 100)) +
>     scale_colour_discrete('Year') + xlab('')
>
> Thanks!
> Art
> _______________________________________
> Art Burke
> Associate
> Education Northwest
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> Art.Burke@educationnorthwest.org
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>
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