[Rd] xy.coords

From: Gabor Grothendieck <ggrothendieck_at_gmail.com>
Date: Sat 31 Dec 2005 - 03:10:53 GMT

In ?xy.coords it says:

     If 'y' is missing and 'x' is a

     formula: of the form 'yvar ~ xvar'. 'xvar' and 'yvar' are used as
          x and y variables.

     list: containing components 'x' and 'y', these are used to define
          plotting coordinates.

     time series: the x values are taken to be 'time(x)' and the y
          values to be the time series.

     matrix with two columns: the first is assumed to contain the x
          values and the second the y values.

however, in fact, if y is missing an error is given. e.g.

x <- 1:3
y <- 4:6

xy.coords(y ~ x) # error
xy.coords(cbind(x, y)) # error
xy.coords(ts(y)) # error

Looking at the code, is.null(y) in the first line of the body should be missing(y) .

R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel Received on Sat Dec 31 14:15:38 2005

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