[R] Calling Function With Arguments In a Script

[Clint Bowman]

?source

as in source("pairwise-plots-continuous-vars.R")

then

plotpairs(first,second,third,wise,title)

should get you going

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On Thu, 7 May 2015, Rich Shepard wrote:

>  I'm starting to put code in multi-use functions rather than in individual
> scripts and have not learned how to invoke the function from the command
> line. If this information is in Norman Matloff's 'The Art of R Programming'
> or Hadley Wickham's 'Advanced R' please point me to the proper place.
>
>  Here's an example, the script 'pairwise-plots-continuous-vars.R' consists
> of this function:
>
> plotpairs <- function(x1,x2,x3,y,plotmain) {
>     require(compositions)
>     opar <- par(mar=c(4,4,3,1))
>     NO3 <- x1
>     SO4 <- x2
>     pH <- x3
>     pairwisePlot(cbind(NO3,SO4,pH),clr(y),add.line=T)
>     title(main=plotmain)
>     par(opar)
>     detach('package:compositions')
>     return()
> }
>
>  (I suppose the return statement is superfluous since there is no value
> returned to a calling function.)
>
>  What I want to do is call plotpairs() with appropriate arguments for each
> plot as needed.
>
> TIA,
>
> Rich
>
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