aroma.affymetrix (version 3.2.2)

CnChipEffectSet$importFromApt: Imports copy-number estimates from an APT summary file

Description

Imports copy-number estimates from an APT summary file. Currently only total copy-number estimates can be imported.

Usage

## Static method (use this):
## CnChipEffectSet$importFromApt(filename, path=NULL, combineAlleles=TRUE, cdf, ...,
##   skip=TRUE, verbose=FALSE)
## Don't use the below:
# S3 method for CnChipEffectSet
importFromApt(static, filename, path=NULL, combineAlleles=TRUE, cdf, ..., skip=TRUE,
  verbose=FALSE)

Value

Returns an CnChipEffectSet.

Arguments

filename

The filename of the APT summary file.

path

An optional path to the file.

combineAlleles

If TRUE, ...

cdf

An AffymetrixCdfFile object.

...

Not used.

skip

If TRUE, already imported arrays will be skipped.

verbose

See Verbose.

Author

Henrik Bengtsson

Details

This import method is robust and memory efficient. One array at the time is imported by first writing to a temporary file which is then renamed to the final name, if import was successful. (If the import failed, a temporary file will rename that has to be deleted manually).

Since only one array at the time is imported, the memory overhead will be bounded allowing to import very large tab-delimited data files containing a large number of arrays. Unfortunately, this approach slows down the reading substantially, because in each import all but one column is parsed but ignored.

See Also

For more information see CnChipEffectSet.