featureData             package:Biobase             R Documentation

Retrieve information on features recorded in eSet-derived
classes.

Description:

     These generic functions access feature data (experiment specific
     information about features) and feature meta-data (e.g.,
     descriptions of feature covariates).

Usage:

     featureData(object)
     featureData(object) <- value
     fData(object)
     fData(object) <- value
     fvarLabels(object)
     fvarLabels(object) <- value
     fvarMetadata(object)
     fvarMetadata(object) <- value

Arguments:

  object: Object, possibly derived from 'eSet-class' or
          'AnnotatedDataFrame-class'.

   value: Value to be assigned to corresponding object.

Value:

     'featureData' returns an object containing information on both
     variable values and variable meta-data.  'fvarLabels' returns a
     character vector of measured variable names. 'fData' returns a
     data frame with features as rows, variables as columns.
     'fvarMetadata' returns a data frame with variable names as rows,
     description tags (e.g., unit of measurement) as columns.

Author(s):

     Biocore

See Also:

     'eSet', 'ExpressionSet'

