R help - Jul 2008 - extracting colnames to label plots in a function

#this is my little function that I would like to use the column names of the
x and y arguments in the function.  I would like it to read
#            site1-site2 how would I do this
diff.temp <- function(x, y ,use="pairwise.complete.obs")
{
    na.method <- pmatch(use, c("all.obs", "complete.obs",
    "pairwise.complete.obs"))
    par(mfrow=c(2,1))
    d <- (x-y)
    plot(d, main="paste(colnames(x))-paste(colnames(y))")
    plot(density(na.omit(coredata(d))))
}

-- 
Let's not spend our time and resources thinking about things that are so
little or so large that all they really do for us is puff us up and make us
feel like gods. We are mammals, and have not exhausted the annoying little
problems of being mammals.

-K. Mullis

	[[alternative HTML version deleted]]

#this is what I came up with
diff.temp <- function(x, a, b,use="pairwise.complete.obs")
{
    library(zoo)
    library(chron)
    na.method <- pmatch(use, c("all.obs", "complete.obs",
    "pairwise.complete.obs"))
    par(mfrow=c(2,1))
    f <- colnames(x)
    d <- (x[,a]-x[,b])
    plot(d, main= paste(f[a], "-", f[b]))
    plot(density(na.omit(coredata(d))), main="")
}

On Sat, Jul 19, 2008 at 12:04 PM, stephen sefick <ssefick@gmail.com>
wrote:
> #this is my little function that I would like to use the column names of
> the x and y arguments in the function.  I would like it to read
> #            site1-site2 how would I do this
> diff.temp <- function(x, y ,use="pairwise.complete.obs")
> {
>     na.method <- pmatch(use, c("all.obs",
"complete.obs",
>     "pairwise.complete.obs"))
>     par(mfrow=c(2,1))
>     d <- (x-y)
>     plot(d, main="paste(colnames(x))-paste(colnames(y))")
>     plot(density(na.omit(coredata(d))))
> }
>
> --
> Let's not spend our time and resources thinking about things that are
so
> little or so large that all they really do for us is puff us up and make us
> feel like gods. We are mammals, and have not exhausted the annoying little
> problems of being mammals.
>
> -K. Mullis
>


-- 
Let's not spend our time and resources thinking about things that are so
little or so large that all they really do for us is puff us up and make us
feel like gods. We are mammals, and have not exhausted the annoying little
problems of being mammals.

-K. Mullis

	[[alternative HTML version deleted]]

See ?paste and the collapse argument, in particular:

   plot(d, main = paste(paste(colnames(x), collapse = " "),
	paste(colnames(y), collapse = " "), sep = " - "))

Also your function sets na.method but never uses it and leaves the par settings
changed afterwards.  See ?par.  It could also benefit from the use of ?match.arg

Also please include drivers that call the posted function so one can
run them in
a reproducible manner.


On Sat, Jul 19, 2008 at 12:04 PM, stephen sefick <ssefick at gmail.com>
wrote:
> #this is my little function that I would like to use the column names of
the
> x and y arguments in the function.  I would like it to read
> #            site1-site2 how would I do this
> diff.temp <- function(x, y ,use="pairwise.complete.obs")
> {
>    na.method <- pmatch(use, c("all.obs",
"complete.obs",
>    "pairwise.complete.obs"))
>    par(mfrow=c(2,1))
>    d <- (x-y)
>    plot(d, main="paste(colnames(x))-paste(colnames(y))")
>    plot(density(na.omit(coredata(d))))
> }
>
> --
> Let's not spend our time and resources thinking about things that are
so
> little or so large that all they really do for us is puff us up and make us
> feel like gods. We are mammals, and have not exhausted the annoying little
> problems of being mammals.
>
> -K. Mullis
>
>        [[alternative HTML version deleted]]
>
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