[R] help using code

[John McDermott]

Hello,

Thanks for the help!

Your answer resolved my problem with the function I listed, but brought up
a larger question. How is the output of the importdata function stored for
use with other functions (as in, how do I call on that data for use with
other functions)? As a simple example I have another function:

meanXY = function(xyzuvw) {
	xy = c(mean(xyzuvw$x), mean(xyzuvw$y))
	return(xy)
}

I know that the xyzuvw portion is referring to the output of the
importdata function, but I don't know how to call up the necessary data
(hope this makes sense).

Thanks again for the help!

John




On 6/11/13 3:05 PM, "Rui Barradas" <ruipbarradas at sapo.pt> wrote:

>Hello,
>
>I believe you are making a confusion on how to call a function in R. You
>don't replace the argument in the function declaration. what you do is
>to call the function like this:
>
>importdata("~/path to/filename.xyzuvwrgb")
>
>leaving the function definition alone.
>
>Hope this helps,
>
>Rui Barradas
>
>Em 11-06-2013 19:52, John McDermott escreveu:
>> Hi R-helpers,
>>
>> I inherited some code that I'm trying to use. As a very new R user I'm
>> having some confusion.
>>
>> I have some input files in the form: filename.xyzuvwrgb which I'm
>>trying to
>> import using:
>>
>> importdata = function(filename) {
>>
>>      p = scan(filename,what=list(x = double(), y = double(), z =
>>double(), u
>> = double(),v=double(),w=double()),skip=1,flush=TRUE,sep=" ")
>>
>>      return(data.frame(x=p$x, y=p$y, z=p$z, u=p$u, v=p$v, w=p$w))
>>
>> }
>>
>>
>>
>> For the filename I replaced both with "~/path to/filename.xyzuvwrgb"
>>and I
>> get the following errors:
>>
>>
>>
>> Error: unexpected string constant in "importdata =
>> function("~/Desktop/thrustScarp1.xyzuvw""
>>
>>
>>
>> Error: no function to return from, jumping to top level
>>
>>
>>
>> Error: unexpected '}' in "}"
>>
>>
>>
>> I'm assuming it has to do with how I am using/formatted the
>> function(filename) portion. How can I get this to work?
>>
>>
>>
>> Thanks for the help!
>>
>>
>>
>>
>>
>>
>>
>> 	[[alternative HTML version deleted]]
>>
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>>