Thanks gabor,
I will implement this and publish an updated package later.
Cheers,
Romain
Le 21 nov. 2011 à 16:31, Gabor Grothendieck <ggrothendi...@gmail.com> a écrit :
> 2011/11/21 Romain François <rom...@r-enthusiasts.com>:
>> Hello,
>>
>> We've released the int64 package to CRAN a few days ago. The package
>> provides S4 classes "int64" and "uint64" that represent signed and unsigned
>> 64 bit integer vectors.
>>
>> One further development of the package is to facilitate reading 64 bit
>> integer data from csv, etc ... files.
>>
>> I have this function that wraps a call to read.csv to:
>> - read the "int64" and "uint64" columns as "character"
>> - converts them afterwards to the appropriate type
>>
>
> Try this:
>
>> library(int64)
>> Lines <- "A\n12\n"
>>
>> setAs("character", "int64", function(from) as.int64(from))
>>
>> DF <- read.csv(textConnection(Lines), colClasses = "int64")
>>
>> str(DF)
> 'data.frame': 1 obs. of 1 variable:
> $ A:Formal class 'int64' [package "int64"] with 2 slots
> .. ..@ .Data:List of 1
> .. .. ..$ : int 0 12
> .. ..@ NAMES: NULL
>
> To convince ourselves that its translating from character to int64:
>
>> setAs("character", "int64", function(from) {print(class(from));
>> as.int64(from)})
>> DF <- read.csv(textConnection(Lines), colClasses = "int64")
> [1] "character"
>
>
> --
> Statistics & Software Consulting
> GKX Group, GKX Associates Inc.
> tel: 1-877-GKX-GROUP
> email: ggrothendieck at gmail.com
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