Plotting Multiple lines on one plot

[R_Learner]

Hi,
  I'm trying to plot multiple lines on one plot. I have a data frame raw, and i want to plot raw$date on the x-axis and raw$theta, raw$vega, raw$delta, and a few others on the y-axis, with a legend. However, I'm not sure what the scale of those data sets are, and I don't know which one will have the largest scale. How can I plot this? I've tried ggplot (qplot), but it doesn't seem to be capable of multiple lines.

Thanks!

[RichardP]

You can set the range for each axis on your plot using the ylim and xlim parameters (use help to see how to implement them). You can find the range or minimum and maximum for each variable (or a number of variables at once) using the min and max commands.

If your ranges vary too much though it will be hard to visualise all the data on the same axis.

R_Learner wrote:

Hi,
  I'm trying to plot multiple lines on one plot. I have a data frame raw, and i want to plot raw$date on the x-axis and raw$theta, raw$vega, raw$delta, and a few others on the y-axis, with a legend. However, I'm not sure what the scale of those data sets are, and I don't know which one will have the largest scale. How can I plot this? I've tried ggplot (qplot), but it doesn't seem to be capable of multiple lines.

Thanks!

[hadley]

The easiest way to do with this ggplot2 is to melt your data first:

dfm <- melt(df, id = "date", measure = c("theta","vega","delta"))
qplot(date, value, data=dfm, geom="line", colour = variable)

Hadley

On Tue, Jul 22, 2008 at 6:05 PM, R_Learner <sschiang8@...> wrote:

>
> Hi,
>  I'm trying to plot multiple lines on one plot. I have a data frame raw,
> and i want to plot raw$date on the x-axis and raw$theta, raw$vega,
> raw$delta, and a few others on the y-axis, with a legend. However, I'm not
> sure what the scale of those data sets are, and I don't know which one will
> have the largest scale. How can I plot this? I've tried ggplot (qplot), but
> it doesn't seem to be capable of multiple lines.
>
> Thanks!
> --
> View this message in context: http://www.nabble.com/Plotting-Multiple-lines-on-one-plot-tp18600665p18600665.html
> Sent from the R help mailing list archive at Nabble.com.
>
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>

--
http://had.co.nz/

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