Hi, ggplot2 automatically adjusts its axes when new data are added to plots; however you wouldn't get an automatic legend if you constructed plots that way.
HTH, baptiste On 13 April 2011 17:06, James Annan <jdan...@jamstec.go.jp> wrote: > Thanks for all the replies. Yes, I agree that calculating all the data first > is a simple solution which also has the benefit of making the axis choice > easier to get right, but on the downside it requires storing an order of > magnitude more output than my original sequential approach would have done. > Not actually a problem for me right now, but may be for larger cases and > certainly seems inelegant in general. So I'm still interested to know if > there is some practical way of returning to an earlier plot. I suppose I > could artificially scale the data to make it match the wrong axes. But that > would be horrible. > > (The example was deliberately simple, but in reality I want to loop through > a bunch of simple simulations each of which generates several types of > output, and create a graph for each type of output.) > > James > > On 13/4/11 1:25 AM, jim holtman wrote: >> >> Instead of trying to go back to a previous plot, gather up all the >> data for the plots and generate each one with the appropriate data. >> This is much easier than trying to keep track of what the dimensions >> are. Also if the data you want to add is outside the plot, then you >> have issues with clipping; knowing what the dimensions of all the data >> you want to plot is a reasonable way to go. >> >> On Tue, Apr 12, 2011 at 9:30 AM, James Annan<jdan...@jamstec.go.jp> >> wrote: >>> >>> I'm sure this must be trivial, but I'm a novice with R and can't work out >>> how to handle the axes when I am constructing multiple plots on a page >>> and >>> try to return to a previous one to put multiple data sets it. >>> >>> A simple example: >>> --- >>> x<- 1:10 >>> y<- (1:100)*3 >>> par(mfcol=c(2,1)) >>> plot(x) >>> plot(y) >>> >>> par(mfg=c(1,1)) >>> lines(x) >>> --- >>> >>> The first 5 lines make two plots with a row of dots along the diagonal of >>> each. I intended the last two statements to add a line to the first plot, >>> that runs along the same data points already plotted there. However, >>> although the commands add a line to the top plot, it is clearly using the >>> axis dimensions of the lower plot. Can someone tell me how to get it to >>> use >>> the axes that are already there? >>> >>> Variants like lines(x,xlim=c(1,10)) have no effect. >>> >>> Thanks in advance for any help. >>> >>> James >>> -- >>> James D Annan jdan...@jamstec.go.jp Tel: +81-45-778-5618 (Fax 5707) >>> Senior Scientist, Research Institute for Global Change, JAMSTEC >>> (The Institute formerly known as Frontier) >>> Yokohama Institute for Earth Sciences, 3173-25 Showamachi, >>> Kanazawa-ku, Yokohama City, Kanagawa, 236-0001 Japan >>> http://www.jamstec.go.jp/frcgc/research/d5/jdannan/ >>> >>> ______________________________________________ >>> R-help@r-project.org mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-help >>> PLEASE do read the posting guide >>> http://www.R-project.org/posting-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >>> >> >> >> > > > -- > James D Annan jdan...@jamstec.go.jp Tel: +81-45-778-5618 (Fax 5707) > Senior Scientist, Research Institute for Global Change, JAMSTEC > (The Institute formerly known as Frontier) > Yokohama Institute for Earth Sciences, 3173-25 Showamachi, > Kanazawa-ku, Yokohama City, Kanagawa, 236-0001 Japan > http://www.jamstec.go.jp/frcgc/research/d5/jdannan/ > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.