[R] Help with syntax error

[Gavin Simpson]

On Mon, 2009-06-15 at 10:54 -0700, Payam Minoofar wrote:
> Hi,
> 
> I have written boxplot commands of this form before, but I don't quite
> understand why the function call is reporting a syntax error in this
> instance. All parameters passed to the function are strings.

You're not seeing the wood for the trees. You get a syntax while
defining the function. Hence there is an error in there and the function
definition fails, R then treats the next line (boxplot(.....) ) as being
a new statement and it complains about 'tframe' not being found -
presumably because there is no object in your global environment with
this name.

> 
> Thanks in advance.
> 
> Payam
> 
> > simplevar <- function(wframe,column1,column2) {
> +     tframe <- get(wframe)
> +     x1 <- which(names(wframe)==column1)
> +     x2 <- which(names(wframe)==column2)
> +     print(tframe[x1])
> +     print(tframe[x2])
> +     gtitle <- paste(names(tframe[x2])," vs. ", names(tframe[x1])
                                                                ^^^^^^^^
Look like you are missing a ")" at the end of the line above. You
haven't closed the call to paste()

> +     quartz(width=7,height=5,dpi=200)
> Error: syntax error
> >     boxplot(tframe[x2] ~ tframe[x1])
> Error in eval(expr, envir, enclos) : object 'tframe' not found
> >
> > }

I think you need to get a better R-aware editor that does bracket
matching as the above is easy to spot in such an environment.

HTH

G

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