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.
# S3 method for GenericTabularFile
writeColumnsToFiles(this, destPath, filenameFmt="%s.txt", tags=NULL, columnName=NULL,
header=NULL, ..., verbose=FALSE)Returns (invisibly) a character
vector of all output files.
The output directory where to write the files.
An sprintf() format string used to generate
filenames given the fullnames (column names plus tags).
An optional character vector of tags added to the fullnames.
...
An optional file header.
Not used.
See Verbose.
Henrik Bengtsson
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.
For more information see GenericTabularFile.