[R] How to Adaptively Set Up the Coordinate Range of Multiple Graphs in One Figure

[Greg Snow]

The best approach is to calculate the limits before doing any plotting and set them appropriately.  You could use your loop to compute y, but instead of calling lines, store the values, then use a function like matplot (or ggplot2 or lattice) to do the plotting.

If you really need to change the limits after the fact (again it is better the other way), there is the zoomplot function in the TeachingDemos package, the 2nd example on the help page does what you describe.

-- 
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 Wonsang You
> Sent: Tuesday, August 31, 2010 4:26 AM
> To: r-help at r-project.org
> Subject: [R] How to Adaptively Set Up the Coordinate Range of Multiple
> Graphs in One Figure
> 
> 
> Hi, R-Helpers,
> 
> I would like to ask about multiple graphs in one figure. I tried to
> execute
> the following codes.
> 
>  xlim <- c(1,100)
> 
> ylim <- c(1,4)
> 
> plot(NA, xlim=xlim, ylim=ylim)
> 
> 
> > x <- c(1:100)
> 
> for(j in seq(1,10,by=1)) {
> 
>      y <- j*x^2+log(j)
> 
>      lines(x, y)
> 
> }
> 
> 
> In the above codes, I had to  arbitrarily set up the coordinate range
> of the
> figure in advance before calculating the values y. (seexlim and ylim)
> In results, the figure did not contain all data since most of data were
> outside the predefined range.
> I am wondering about how to control xlim and ylim adaptive to the real
> range
> of data, in order to include all data in the figure.
> Thank you for your great help and contribution.
> 
> Best Regards,
> Stephen You
> 
> 
> -----
> --
> Wonsang You
> Special Lab Non-Invasive Brain Imaging
> Leibniz Institute for Neurobiology
> http://www.ifn-magdeburg.de
> --
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> Figure-tp2401337p2401337.html
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