[R] Multiple line-plots from one data file using factor

[baptiste auguie]

Hi,

It's a piece of cake with ggplot,

d <- read.table(textConnection("id x y
1  10  500
1  15  300
1  23  215
1  34  200
2  5    400
2  13  340
2  15  210
3  10  200
3  12  150
3  16  30"), head=TRUE)

str(d)


library(ggplot2)

p <-
ggplot(d) +
  geom_path(aes(x,y, group=id))

p ## grouping withouth legend

## colour based on id
p + aes(colour=factor(id))

## linetype based on id
p + aes(linetype=factor(id))

HTH,

baptiste

On 4 February 2011 12:04, jonathan byrne <jonathanbyrn at gmail.com> wrote:
> Hi,
> I'm processing a data file with the following structure:
> #index  time distance
> 1  10  500
> 1  15  300
> 1  23  215
> 1  34  200
> 2  5    400
> 2  13  340
> 2  15  210
> 3  10  200
> 3  12  150
> 3  16  30
> etc
>
> My intention was to generate line plots for the datapoints using their index
> to group the elements. I managed to get something to work using a for loop
> and some conditionals but I was wondering if there is a better way using
> factor or some other R method? Any help improving my R coding would be
> greatly appreciated!
> Thanks
> Jonathan
>
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>
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