Thanks to everybody for the solutions. On Tue, Jul 27, 2010 at 3:47 AM, Dennis Murphy <[email protected]> wrote: > Hi: > > Another approach might be to use the melt() function in package reshape > before creating the plot with xyplot, something along the lines of the > following: > > library(reshape) > mdat <- melt(data, id = 'X') > > This should create a data frame with three columns: X, variable (all the D* > names as factor levels) and value (stacked version of the D*s). Then use > something like > > xyplot(value ~ X, data = mdat, groups = 'variable', ...) > xyplot(value ~ X | variable, data = mdat, ...) > > One advantage of this approach is that you'll get the same structure out of > melt() no matter how many D* columns you have; > another is that the code block is small and relatively easy to remember six > months from now. Here's a simple toy example: > > library(reshape) > library(lattice) > d <- data.frame(x = 1:20, y1 = rnorm(20), y2 = rnorm(20), y3 = rnorm(20)) > > # Reshape the data: > m <- melt(d, id = 'x') > > # xyplot with a basic legend > > # melted data > xyplot(value ~ x, data = m, groups = variable, > auto.key = list(space = 'right', points = TRUE, lines = FALSE)) > # plot from the original data > xyplot(y1 + y2 + y3 ~ x, data = d, > auto.key = list(space = 'right', points = TRUE, lines = FALSE)) # > identical except for y label > > HTH, > Dennis > > On Mon, Jul 26, 2010 at 7:26 PM, Rajarshi Guha <[email protected]> > wrote: >> >> Hi, I have a data.frame with columns named X, D1, D2, D3 >> >> I know I can get a single plot with 3 curves by doing >> >> xyplot(D1 + D2 + D3 ~ X, data) >> >> but in some cases I might have columns D1 ... D10. >> >> Is there a way to plot all 10 columns without having to specify each >> individual term? >> >> (By analogy with formulae in lm, I thought, xyplot(. ~ X, data) would >> work, but it didn't) >> >> Thanks, >> >> -- >> Rajarshi Guha >> NIH Chemical Genomics Center >> >> ______________________________________________ >> [email protected] 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. > >
-- Rajarshi Guha NIH Chemical Genomics Center ______________________________________________ [email protected] 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.
