[R] Discontinuous graph

baptiste auguie
Mon, 16 Nov 2009 18:31:28 -0000

Hi,

An alternative with ggplot2,

library(ggplot2)

ggplot(data=coords) +
  geom_segment(aes(x=a, xend=b, y=c, yend=c))


HTH,

baptiste

2009/11/16 David Winsemius <dwinsemius at
comcast.net>:
>
> On Nov 16, 2009, at 12:40 PM, Tim Smith wrote:
>
>> Hi,
>> I wanted to make a graph with the following table (2 rows, 3 columns):
>> a b c
>> x 1 3 5
>> y 5 8 6
>> The first column represents the start cordinate, and the second column
>> contains the end cordinate for the x-axis. The third column contains
the
>> y-axis co-ordinate. For example, the first row in the matrix above
>> represents the points (1,5),(2,5), (3,5). How would I go about making a
>> discontinuous graph ?
>>
>> thanks!
>
> coords <- read.table(textConnection("a b c
> ?x 1 3 5
> ?y 5 8 6"), header=TRUE)
>
> ?plot(NULL, NULL, xlim = c(min(coords$a)-.5, max(coords$b)+.5),
> ylim=c(min(coords$c)-.5, max(coords$c)+.5) ?)
> ?apply(coords, 1, function(x) segments(x0=x[1],y0= x[3], x1= x[2], y1=x[3])
> )
>
> --
>
> David Winsemius, MD
> Heritage Laboratories
> West Hartford, CT
>
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