HELP (version 1.30.0)

getFeatures: Get features (methods)

Description

Fetch a subset of features from a given data structure

Usage

getFeatures(x, y, ...)

Arguments

x

the matrix of feature data to subset. If x is a vector it is interpreted as a matrix. x can also be of class "ExpressionSet" or an "AnnotatedDataFrame" object.

y

which feature(s) to use. Can be a vector of characters matching feature names, integers indicating which features to choose, or a mixture of the two. If not supplied (or if equivalent to "*"), all features will be used.

...

other arguments passed are not handled at this time.

Value

Returns a matrix of values corresponding to a subset of features from the data structure supplied, where columns correspond to features. Function halts if no features to return.

See Also

getFeatures-methods

Examples

data(sample.ExpressionSet)
df <- data.frame(x=1:500,y=501:1000, row.names=featureNames(sample.ExpressionSet))
featureData(sample.ExpressionSet) <- new("AnnotatedDataFrame", data=df, dimLabels=c("featureNames", ""))
getFeatures(sample.ExpressionSet, "y")[1:10]