Description Objects from the Class Slots Extends Methods Author(s) See Also Examples
These classes and methods facilitate navigation of the Affymetrix DTT sample attribute files. DTT files are generated by the Affymetrix GCOS application. Specifically, the classes are R representations of the Affymetrix classes defined in MAGE-ML.dtd. The 'show' methods for these classs indicate how objects are to be accessed; details are in the ‘Retrieving MAGE and ARR sample attributes’ vignette.
Objects are created internally, by parsing XML retrieved from ARR, and are not created directly by the user.
Objects have a variety of slots. To discover slot names and content
type, see the slotNames
portion of the example, below.
Class "DTTCompatibility"
, directly.
Class "AffyCompatible"
, by class "DTTCompatibility", distance 2.
'Accessor' methods are defined on auto-generated classes to access slot content.
Accessors are apparent from displaying the object; each line of the
display is of the form accessor: content
. To retrieve the
content of an instance object
, invoke accessor(object)
.
Some objects contains several instances of another object. These
'typed associations' are represented by the
.TypedAssociation
class, and are navigated or
subset as one would a standard R vector, e.g., using [
,
[[
. A useful paradigm for displaying all instances is
illustrated in the vignette.
Martin Morgan <mtmorgan@fhcrc.org>
Vignette ‘Retrieving MAGE and ARR sample attributes’.
1 2 3 4 | ## defined and auto-generated classes
names(slot(getClass("DTTCompatibility",
where=getNamespace("AffyCompatible")),
"subclasses"))
|
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