Estimate prototypes from a single cluster

Takes in a single cluster, x, and y and returns an integer of the index of the feature prototype (the feature from the cluster most correlated with the response).

Usage

identifyPrototype(cluster_members_i, x, y)

Arguments

cluster_members_i

An integer vector of indices of features that are in a common cluster. Must have length at least 2.

x

n x p numeric matrix; design matrix.

y

Numeric response vector. Note: in general, the css function does not require y to be a numeric vector, because the provided fitfun could use a different form of y (for example, a categorical response variable). However, y must be numeric in order to provide prototypes because the prototypes are determined using the correlation between cluster members (columns of x) and y.

Value

integer; the index of the feature identified as the prototype for the cluster.

Author

Gregory Faletto, Jacob Bien