writeColumnsToFiles.GenericTabularFile {R.filesets} | R Documentation |
Read each column from a data file and exports it to a separate file
Description
Read each column from a data file and exports it to a separate file. Since each column is processed independently of the others, this method is memory efficient and can handle very large data files.
Usage
## S3 method for class 'GenericTabularFile'
writeColumnsToFiles(this, destPath, filenameFmt="%s.txt", tags=NULL, columnName=NULL,
header=NULL, ..., verbose=FALSE)
Arguments
destPath |
The output directory where to write the files. |
filenameFmt |
An |
tags |
An optional |
columnName |
... |
header |
An optional file header. |
... |
Not used. |
verbose |
See |
Details
Each file generated is written atomically by first writing to a temporary file which is then renamed if successfully written. This minimizes the risk for creating incomplete files, which otherwise may occur if for instance an interrupt occurred.
Value
Returns (invisibly) a character
vector
of all output files.
Author(s)
Henrik Bengtsson
See Also
For more information see GenericTabularFile
.