Comments (3)
It looks to work well.
At least in my case http://stackoverflow.com/questions/35295320/the-fastest-way-to-write-csv-file-by-write-csv-raw-iotools-package.
It would be nice to add ability to define decimal sign like ' dec="," ' .
from iotools.
Looks like append and fileEncoding are also left out, though append seems to work. fileEncoding doesn't apply for me, but having col.names would be great. Currently doing the following as a workaround:
cat(noquote(paste0(paste0(names(df),collapse = ","),"\n")),file = "output.csv")
write.csv.raw(df,"output.csv",append=TRUE)
Note that "\n" is required to avoid starting the append on the first line of the file.
from iotools.
Comparison of 'write.csv.raw' and other write-methods (details see at http://stackoverflow.com/questions/35295320/the-fastest-way-to-write-csv-file-by-write-csv-raw-iotools-package):
system.time(write.csv.raw(n,"test.csv",sep=";",append=TRUE))
user system elapsed
15.61 1.17 21.92
system.time(write.table(n,"test.csv",sep=";",row.names=FALSE,dec=","))
user system elapsed
63.25 1.20 64.60
system.time(write.csv2(n,"test.csv",row.names=FALSE))
user system elapsed
63.71 1.28 65.38
system.time(write_csv(n, "test.csv", na = "NA"))
user system elapsed
136.75 3.60 141.24
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Related Issues (20)
- I'm getting a segfault when running chunk.apply in parallel HOT 1
- Adding the connection function to input.file HOT 2
- header option not working with read.table.raw HOT 1
- calling ctapply on large matrices results in gc problems HOT 1
- Install failing for R 3.1.1
- Let dstrsplit remove nul characters HOT 3
- Windows line endings
- Quote handling
- mstrsplit segfault with raw vector when no newlines present
- dstrsplit(): missing integers will parse to 0 instead of NA
- Add a prefetch parameter to imstrsplit HOT 1
- How to compile it? HOT 1
- read.csv.raw fails if all rows are skipped and if colClasses are absent -- unlike utils::read.csv
- problem with chunk.tapply HOT 1
- ?dstrfw should be more upfront about the use of col_types names
- duplicated line of code in dstrfw HOT 1
- Add a matrix version of fdrbind
- Typo in documentation HOT 1
- write.csv.raw colnames adds null character
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from iotools.