Hi,
Still no data (either not attached or a format the mail server
scrubs), but I made some up. ddply seems to be a bit tricky in that
it holds off evaluating its arguments. I honestly am not sure how to
get around that---no amount of fancy footwork with eval() or quote()
is going to change the internals of ddply. The easiest approach seems
to be to change the call to it in the first place. You cannot do this
by passing arguments, but you can by using subsitute() to have your
test function construct and then evaluate the ddply() call. Here is a
working example:
require(plyr)
pb <- data.frame(Type = sample(6, 30, TRUE),
Sex = sample(0:1, 30, TRUE),
Speaker = sample(3, 30, TRUE),
F1 = rnorm(30))
insidefun <- function(x){
return(x+1)
}
testfun <- function(data, factors, x, fun = quote(summarize)) {
arglist <- list(data = data, factors = as.quoted(factors), fun = fun, x = x)
myd <- substitute(ddply(.data=data,
.variables=factors, .fun = fun, norm = x), arglist)
out <- eval(myd)
return(out)
}
testfun(pb, c("Type","Sex","Speaker"), x = quote(insidefun(F1)))
By the way, in its present state, this is essentially a painfully
complex wrapper to ddply and your code would probably be less buggy
and easier to understand just using ddply, but presumably you are
planning to have some other stuff go on in the real testfun().
Cheers,
Josh
On Sun, Mar 4, 2012 at 9:06 AM, Fredrik Karlsson <dargo...@gmail.com> wrote:
> Hi,
>
> Sorry all - I will provide a reproducable version of this. I am still
> seeing the same problem - maybe it is due to me having to use summarize?
> Anyway, here is an example (using the data set attached):
>
> Two test functions:
>
> insidefun <- function(x){
>
> return(x+1)
> }
>
> testfun <- function(data,factors,x){
>
> datOrig <- ddply(.data=data,
> .variables=as.quoted(factors),
> .fun=summarize,
> norm=insidefun(x)
> )
>
> }
>
>> testfun(pb,c("Type","Sex","Speaker"),F1)
> Error in insidefun(x) : object 'x' not found
>
> Now, if I call ddply directly, it works:
>
>> head(ddply(pb,.(Type,Sex,Speaker),summarize,norm=insidefun(F1)),4)
> Type Sex Speaker norm
> 1 c f 62 461
> 2 c f 62 401
> 3 c f 62 601
> 4 c f 62 611
>
> I'm sure I'm doing something stupid - and of course I see that the ddply call
> inside the function will have to do some processing in order to get the
> arguments in the right mode/class - but I don't know how.
>
> /Fredrik
>
>
>
>
> On Sun, Mar 4, 2012 at 6:44 AM, David Winsemius <dwinsem...@comcast.net>wrote:
>
>>
>> On Mar 4, 2012, at 12:20 AM, Fredrik Karlsson wrote:
>>
>> Hi Michael,
>>>
>>> No, sorry - that is neither the problem or the solution.
>>>
>>> suspicious.vowels(pb,c("Type",**"Sex","Vowel"),F1,F2)
>>>>
>>> Error in mean(y, na.rm = na.rm) : object 'f1' not found
>>>
>>>
>> Obviously you have still failed to offer reproducible code to go along
>> wiht your questions, but I would observe that in R that f1 is NOT going to
>> equal F1.
>>
>> --
>>
>>>
>>> /Fredrik
>>>
>>> On Sat, Mar 3, 2012 at 7:04 PM, R. Michael Weylandt <
>>> michael.weyla...@gmail.com> wrote:
>>>
>>> Untested, but it might be simpler than that:
>>>>
>>>> suspicious.vowels(pb,c("Type",**"Sex","Vowel"),"F1",F2)
>>>>
>>>> Note that "F1" is in quotes but F2 isn't.
>>>>
>>>> Michael
>>>>
>>>> On Sat, Mar 3, 2012 at 5:46 PM, Fredrik Karlsson <dargo...@gmail.com>
>>>> wrote:
>>>>
>>>>> Dear list,
>>>>>
>>>>> Sorry, but I cannot get my head around how and I could pass arguments
>>>>>
>>>> along
>>>>
>>>>> to high-level functions. What I have is a function that would benefit
>>>>>
>>>> from
>>>>
>>>>> me using ddply from the plyr package.
>>>>> However, I cannot get the arguments passing part right.
>>>>>
>>>>> So, this is my function:
>>>>>
>>>>> suspicious.vowels <-
>>>>>>
>>>>> function(data,factors,f1,f2,**evaluate.original.params=TRUE) {
>>>>>
>>>>> datOrig <- ddply(.data=data,
>>>>> .variables=as.quoted(factors),
>>>>> .fun=summarize,
>>>>> norm=vector.space(f1,f2)[["**Vector norms"]]
>>>>> )
>>>>>
>>>>>
>>>>> print(datOrig)
>>>>>
>>>>> }
>>>>>
>>>>> Of course, if I try to call this function, I get an error message
>>>>> telling
>>>>> me that the "f1" argument does not exist:
>>>>>
>>>>> suspicious.vowels(pb,c("Type",**"Sex","Vowel"),"F1",F2)
>>>>>>
>>>>> Error in mean(y, na.rm = na.rm) : object 'f1' not found
>>>>>
>>>>> However, the corresponding ddply call, when called from the console,
>>>>> does
>>>>> work:
>>>>>
>>>>>
>>>>>>
>>>>> head(ddply(pb,as.quoted(c("**Type","Sex","Vowel")),**
>>>> summarize,norm=vector.space(**F1,F2)[["Vector
>>>>
>>>>> norms"]]),4)
>>>>> Type Sex Vowel norm
>>>>> 1 c f aa 250.1570
>>>>> 2 c f aa 497.2711
>>>>> 3 c f aa 172.3108
>>>>> 4 c f aa 109.4464
>>>>> ...
>>>>>
>>>>> So, how do I modify the function to pass the arguments that I supply
>>>>> correctly? I cannot get my head around this enough to find the correct
>>>>> combination of deparse /substitute /... to get this right.
>>>>>
>>>>> I would be thankful for all the help I could get on this.
>>>>>
>>>>> /Fredrik
>>>>>
>>>>> --
>>>>> "Life is like a trumpet - if you don't put anything into it, you don't
>>>>>
>>>> get
>>>>
>>>>> anything out of it."
>>>>>
>>>>> [[alternative HTML version deleted]]
>>>>>
>>>>> ______________________________**________________
>>>>> R-help@r-project.org mailing list
>>>>> https://stat.ethz.ch/mailman/**listinfo/r-help<https://stat.ethz.ch/mailman/listinfo/r-help>
>>>>> PLEASE do read the posting guide
>>>>>
>>>> http://www.R-project.org/**posting-guide.html<http://www.R-project.org/posting-guide.html>
>>>>
>>>>> and provide commented, minimal, self-contained, reproducible code.
>>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>> "Life is like a trumpet - if you don't put anything into it, you don't get
>>> anything out of it."
>>>
>>> [[alternative HTML version deleted]]
>>>
>>> ______________________________**________________
>>> R-help@r-project.org mailing list
>>> https://stat.ethz.ch/mailman/**listinfo/r-help<https://stat.ethz.ch/mailman/listinfo/r-help>
>>> PLEASE do read the posting guide http://www.R-project.org/**
>>> posting-guide.html <http://www.R-project.org/posting-guide.html>
>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>
>> David Winsemius, MD
>> West Hartford, CT
>>
>>
>
>
> --
> "Life is like a trumpet - if you don't put anything into it, you don't get
> anything out of it."
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
--
Joshua Wiley
Ph.D. Student, Health Psychology
Programmer Analyst II, Statistical Consulting Group
University of California, Los Angeles
https://joshuawiley.com/
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
