[R] plotting multiple lines on single graph ggplot2

[John Kane]

There are probably lots of better aproaches but this seems to work.  I just combined the lines into one vector and assighed a dummy variable to mark the diffferent lines

ibrary(ggplot2)
mydata <- data.frame(xrange <- c(100, 200, 300, 400, 500, 600, 
        700, 800, 900, 1000),
        yrange = c( 1.1, 1.2, 1.3, 1.4, 1.5, 1.5, 1.7, 1.9, 2.0, 2.4),
        mark = c(rep("a",5), rep("b", 5)))
          
p <- ggplot(mydata, aes( xrange, yrange, colour= mark)) 

p <- p + geom_line()

p

--- On Mon, 11/28/11, Abdul Wahid Memon <engrwahidmemon at gmail.com> wrote:

> From: Abdul Wahid Memon <engrwahidmemon at gmail.com>
> Subject: [R] plotting multiple lines on single graph ggplot2
> To: r-help at r-project.org
> Received: Monday, November 28, 2011, 9:35 AM
> Hello everyone
> 
> I have some data of the following type.
> 
> 100 200 300 400 500
> 1.1 1.2 1.3 1.4 1.5
> 600 700 800 900 1000
> 1.5 1.7 1.9 2.0 2.4
> 
> With plot() and points functions I can plot these 4 lines
> of data. But
> I dont know how to do it with qplot or ggplot functions.
> The scenario
> is something like this: the hundreds should appear on
> x-axis and the
> fractional values of y axis.
> 
> Thanks alot.
> 
> MEMON Abdul Wahid
> 
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