Displaying 5 results from an estimated 5 matches for "physicalelementno".
2012 Jul 25
3
ff package: reading selected columns from csv
...vfile, header=FALSE, skip=100,
> colClasses=x.class, nrows=1e3)
ffdf (all open) dim=c(1000,1), dimorder=c(1,2) row.names=NULL
ffdf virtual mapping
PhysicalName VirtualVmode PhysicalVmode AsIs VirtualIsMatrix
V2 V2 double double FALSE FALSE
PhysicalIsMatrix PhysicalElementNo PhysicalFirstCol PhysicalLastCol
V2 FALSE 1 1 1
PhysicalIsOpen
V2 TRUE
ffdf data
V2
1 -0.5412
2 -0.5842
3 -0.5920
4 -0.5451
5 -0.5099
6 -0.5021
7 -0.4943
8 -0.5490
: :
993 -0.4865
994 -...
2010 Dec 24
1
How to specify ff object filepaths when reading a CSV file into a ff data frame.
Hi,
The read.csv.ffdf function in package ff will create the ff object
physical file in the default directories, I am trying to let the files
created in the paths users specify, I think the point is to make use
of the asffdf_args parameter,
I have a test CSV file named D:\rtemp\fftest.csv, the content of the
file is as following:
col1,col2,col3
1,"amber",2.4
2,"linda",4.5
2012 Oct 02
1
ffsave problems
...: chr "double" "short" "integer" "integer" ...
.. $ AsIs : logi FALSE FALSE FALSE FALSE FALSE FALSE
.. $ VirtualIsMatrix : logi FALSE FALSE FALSE FALSE FALSE FALSE
.. $ PhysicalIsMatrix : logi FALSE FALSE FALSE FALSE FALSE FALSE
.. $ PhysicalElementNo: int 1 2 3 4 5 6
.. $ PhysicalFirstCol : int 1 1 1 1 1 1
.. $ PhysicalLastCol : int 1 1 1 1 1 1
.. - attr(*, "Dim")= int 65640757 6
.. - attr(*, "Dimorder")= int 1 2
$ physical: List of 6
.. $ fecha : list()
.. ..- attr(*, "physical")=Class 'ff_poi...
2012 Oct 31
1
ffdfindexget from package ff
I'm having trouble getting ffdfindexget to work right in Windows. Even the
most trivial of examples gives me problems.
> myVec = ff(1:5)
> another = ff(10:14)
> littleFrame = ffdf(myVec, another)
> posVec = ff(c(2, 4), vmode = 'integer')
> ffdfindexget(littleFrame, posVec)
Error in if (any(B < 1)) stop("B too small") :
missing value where TRUE/FALSE
2012 May 04
2
Can't import this 4GB DATASET
...;, 'rt')
# read the remainder using read.table.ffdf
ffdf <- read.table.ffdf(file=con)
# close connection
close(con)
ffdf
#ffdf (all open) dim=c(29,9), dimorder=c(1,2) row.names=NULL
#ffdf virtual mapping
# PhysicalName VirtualVmode PhysicalVmode AsIs VirtualIsMatrix
PhysicalIsMatrix PhysicalElementNo PhysicalFirstCol PhysicalLastCol
PhysicalIsOpen
V1 V1 integer integer FALSE FALSE
FALSE 1 1 1 TRUE
V2 V2 integer integer FALSE FALSE
FALSE 2...