search for: physicalisopen

Displaying 4 results from an estimated 4 matches for "physicalisopen".

2012 Jul 25
3
ff package: reading selected columns from csv
...ULL 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 -0.6584 995 -0.7482 996 -0.8732 997 -0.8303 998 -0.7248 999 -0.5490 1000 -0.4240 *Then I extend nrows by 1, I get war...
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 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
...ble.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 1 1 TRUE V3...