| readPgf {affxparser} | R Documentation |
This function parses a PGF file using the Affymetrix Fusion SDK. PGF (probe group) files describe probes present within probe sets, including the type (e.g., pm, mm) of the probe and probeset.
readPgf(file, indices = NULL)
file |
character(1) providing a path to the PGF file to be
input. |
indices |
integer(n) a vector of indices of the probesets to
be read. |
An list. The header element is always present; the
remainder are present when readBody=TRUE.
The elements present when readBody=TRUE describe probe sets,
atoms, and probes. Elements within probe sets, for instance, are
coordinated such that the ith index of one vector (e.g.,
probesetId) corresponds to the ith index of a second
vector (e.g., probesetType). The atoms contained within
probeset i are in positions
probesetStartAtom[i]:(probesetStartAtom[i+1]-1) of the atom
vectors. A similar map applies to probes within atoms, using
atomStartProbe as the index.
The PGF file format includes optional elements; these elements are
always present in the list, but with appropriate default values.
header |
A list with information about the PGF file. The list contains elements described in the PGF file format document referenced below. |
probesetId |
integer vector of probeset identifiers. |
probesetType |
character vector of probeset types. Types are described in the PGF file format document. |
probesetName |
character vector of probeset names. |
probesetStartAtom |
integer vector of the start index
(e.g., in the element atomId of atoms belonging to this probeset). |
atomId |
integer vector of atom identifiers. |
atomExonPosition |
integer vector of probe interrogation position relative to the target sequence. |
atomStartProbe |
integer vector of the start index (e.g., in the
element probeId of probes belonging to this atom). |
probeId |
integer vector of probe identifiers. |
probeType |
character vector of probe types. Types are described in the PGF file format document. |
probeGcCount |
integer vector of probe GC content. |
probeLength |
integer vector of probe lengths. |
probeInterrogationPosition |
integer vector of the position, within the probe, at which interrogation occurs. |
probeSequence |
character vector of the probe sequence. |
Martin Morgan mtmorgan@fhcrc.org
https://www.affymetrix.com/support/developer/fusion/File_Format_PGF_aptv161.pdf describes PGF file content.
The internal function .pgfProbeIndexFromProbesetIndex provides
a map between
the indicies of probe set entries and the indicies of the probes
contained in the probe set.