Displaying 2 results from an estimated 2 matches for "col_arg".
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2013 Feb 27
0
How to specify ff object filepaths when reading a CSV file into a ff data frame.
Really old subject?, so, all my apologizes for digging up
but, since I also ran into this? maybe this hack can be useful to someone
I propose monkey patching here:
library(ff)
my.as.ffdf.data.frame <- function (x, vmode = NULL, col_args = list(), ...)
{
rnam <- attr(x, "row.names")
if (is.integer(rnam)) {
if (all(rnam == seq_along(rnam)))
rnam <- NULL
else rnam <- as.character(rnam)
}
x <- as.list(x)
vmodes <- vector("list", length(x))
if (!is.null(vmode)) {
nam <- names...
2010 Dec 24
1
How to specify ff object filepaths when reading a CSV file into a ff data frame.
...file is as following:
col1,col2,col3
1,"amber",2.4
2,"linda",4.5
I tried the following code, hoping ff will create the physical files
for col1,col2 and col3 to D:/a.f,D:/b.f,D:/c.f respectively
fdf <- read.csv.ffdf(file="D:/rtemp/fftest.csv",asffdf_args = list(
col_args = c(list(filename="D:/a.f"), list(filename="D:/b.f"),
list(filename="D:/c.f"))))
and the error message is :
Error in as.ff.default(1:2, vmode = NULL, filename = "D:/a.f",
filename = "D:/b.f", :
formal argument "filename" matched by mu...