Your program works as is if you choose Mean but you have
introduced two new errors:
1. SD is not defined in your program.
2. if multiple choices are taken then it will try to pass a vector to
my.match.fun but that calls match.fun which only allows functions
to be passed to it. You will have to translate each character string
to a function separately.
Try this:
funs <- c("Mean", "SD")
f <- function(fun) aggregate(data1, as.yearqtr, get(fun))
do.call(cbind, sapply(tolower(funs), f, simplify = FALSE))
On Sun, Jul 6, 2008 at 10:43 PM, Megh Dal <[EMAIL PROTECTED]> wrote:
> I made some changes and also incorporated your advice :
>
> library(zoo)
> Z.index <- as.Date(sample(12450:15500, 3000))
> Z.data <- matrix(rnorm(300), ncol = 1)
>
> data1 <- zoo(Z.data, Z.index)
>
> fnc = function(data1)
> {
> selection2 = select.list(c("Mean", "SD"), multiple = T)
>
> Mean = function(dataa) mean(dataa)
> my.match.fun <- function(x) match.fun(x) ###
> selection2 <- my.match.fun(selection2) ###
> ag = function(z, by, selection2)
> {
> f = function(f) aggregate(z, by, f)
> do.call(cbind, sapply(selection2, f, simplify = F))
> }
>
> return(aggregate(data1, as.yearqtr, selection2))
> }
>
> fnc(data1)
>
> But still getting same error.
>
>
> --- On Mon, 7/7/08, Gabor Grothendieck <[EMAIL PROTECTED]> wrote:
>
>> From: Gabor Grothendieck <[EMAIL PROTECTED]>
>> Subject: Re: [R] Error in defining function
>> To: [EMAIL PROTECTED]
>> Cc: [EMAIL PROTECTED]
>> Date: Monday, July 7, 2008, 1:23 AM
>> On Sun, Jul 6, 2008 at 3:19 PM, Megh Dal
>> <[EMAIL PROTECTED]> wrote:
>> > Can anyone please tell me why I am getting this error?
>> >
>> > library(zoo)
>> > Z.index <- as.Date(sample(12450:15500, 3000))
>> > Z.data <- matrix(rnorm(300), ncol = 1)
>> >
>> > data1 <- zoo(Z.data, Z.index)
>> >
>> > fnc = function(data1)
>> > {
>> > selection2 = select.list(c("Mean"),
>> multiple = F)
>> >
>> > Mean = function(dataa) mean(dataa)
>> >
>> > return(aggregate(data1, as.yearqtr, selection2))
>> > }
>> >
>> > fnc(data1)
>> >
>> > I got following error :
>> > Error in get(as.character(FUN), mode =
>> "function", envir = envir) :
>> > variable "Mean" of mode
>> "function" was not found
>> >
>>
>> Its a bug in aggregate.zoo . Its just been fixed in the
>> zoo devel version
>> available on R-Forge so you can either grab that or use the
>> workaround
>> below:
>>
>> library(zoo)
>>
>> set.seed(1)
>> Z.data <- matrix(rnorm(300), ncol = 1)
>> Z.index <- as.Date(sample(12450:15500, 3000))
>> data1 <- zoo(Z.data, Z.index)
>>
>> fnc <- function(data1) {
>> selection2 <- select.list("Mean", multiple
>> = FALSE)
>> Mean <- function(dataa) mean(dataa)
>>
>> my.match.fun <- function(x) match.fun(x) ###
>> selection2 <- my.match.fun(selection2) ###
>>
>> return(aggregate(data1, as.yearqtr, selection2))
>> }
>>
>> fnc(data1)
>
>
>
>
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