Construct a partial projector

Create a new projector instance restricted to a subset of input columns. This function allows for the generation of a new projection object that focuses only on the specified columns, enabling the projection of data using a limited set of variables.

Usage

partial_projector(x, colind, ...)

Arguments

x

The original projector instance, typically an object of class bi_projector or any other class that implements a partial_projector method

colind

A numeric vector of column indices to select in the projection matrix. These indices correspond to the variables used for the partial projector

...

Additional arguments passed to the underlying partial_projector method

Value

A new projector instance, with the same class as the original object, that is restricted to the specified subset of input columns

See also

bi_projector for an example of a class that implements a partial_projector method

Examples

# Example with the bi_projector class
X <- matrix(rnorm(10*20), 10, 20)
svdfit <- svd(X)
p <- bi_projector(svdfit$v, s = svdfit$u %*% diag(svdfit$d), sdev=svdfit$d)

# Create a partial projector using only the first 10 variables
colind <- 1:10
partial_p <- partial_projector(p, colind)