R help - Jul 2010 - adding new devices and plots

Dear R People:

I have the following function:
> eplot
function (x)
{
    plot(x)
    z <- locator(2)
    dev.new()
    plot(window(x, start = min(z$x), end = max(z$x)))
}
>
I want to generate a new plot from a subset of the original, but I
want to keep the original plot up.  When I use this, it opens a new
window, but the first device goes blank.

Is there a way around this, please?

Thank you!
Sincerely,
Erin


-- 
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
mailto: erinm.hodgess at gmail.com

It is possible that the plot function starts to plot before the new device is
fully in place, you could try sleeping for a second or 2 between the call to
dev.new and the call to plot.

-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Erin Hodgess
> Sent: Thursday, July 29, 2010 12:16 PM
> To: R help
> Subject: [R] adding new devices and plots
> 
> Dear R People:
> 
> I have the following function:
> 
> > eplot
> function (x)
> {
>     plot(x)
>     z <- locator(2)
>     dev.new()
>     plot(window(x, start = min(z$x), end = max(z$x)))
> }
> >
> 
> I want to generate a new plot from a subset of the original, but I
> want to keep the original plot up.  When I use this, it opens a new
> window, but the first device goes blank.
> 
> Is there a way around this, please?
> 
> Thank you!
> Sincerely,
> Erin
> 
> 
> --
> Erin Hodgess
> Associate Professor
> Department of Computer and Mathematical Sciences
> University of Houston - Downtown
> mailto: erinm.hodgess at gmail.com
> 
> ______________________________________________
> R-help at r-project.org mailing list
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> PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> and provide commented, minimal, self-contained, reproducible code.

On 07/30/2010 04:15 AM, Erin Hodgess wrote:
> Dear R People:
>
> I have the following function:
>
>> eplot
> function (x)
> {
>      plot(x)
>      z<- locator(2)
>      dev.new()
>      plot(window(x, start = min(z$x), end = max(z$x)))
> }
>>
>
> I want to generate a new plot from a subset of the original, but I
> want to keep the original plot up.  When I use this, it opens a new
> window, but the first device goes blank.
>
Hi Erin,
Maybe you want something like zoomInPlot (plotrix).

Jim