predict.sparseSVM: Model predictions based on "sparseSVM" object.

Description

This function returns fitted values, coefficients and more from a fitted "sparseSVM" object.

Usage

# S3 method for sparseSVM
predict(object, X, lambda, type = c("class","coefficients","nvars"), 
    exact = FALSE, ...)
# S3 method for sparseSVM
coef(object, lambda, exact = FALSE, ...)

Value

The object returned depends on type.

Arguments

object: Fitted "sparseSVM" model object.
X: Matrix of values at which predictions are to be made. Used only for type = "class".
lambda: Values of the regularization parameter lambda at which predictions are requested. Default is the entire sequence used to create the model.
type: Type of prediction. "class" returns the class labels; "coefficients" returns the coefficients; "nvars" returns the number of nonzero coefficients at each value of lambda.
exact: If exact=FALSE (default), then the function uses linear interpolation to make predictions for values of lambda that do not coincide with those used to fit the model. If exact=TRUE, and predictions are requested at values of lambda not included in the original fit, the model is refit on a lambda sequence consisting object$lambda and the new ones before predictions are made.
...: Not used. Other arguments to predict.

Author

Congrui Yi and Yaohui Zeng
Maintainer: Congrui Yi <eric.ycr@gmail.com>

Examples

Run this code

X = matrix(rnorm(1000*100), 1000, 100)
b = 3
w = 5*rnorm(10)
eps = rnorm(1000)
y = sign(b + drop(X[,1:10] %*% w + eps))

fit = sparseSVM(X, y)
predict(fit, X[1:5,], lambda = c(0.05, 0.03))
predict(fit, X[1:5,], lambda = 0.05, exact = TRUE)
predict(fit, type = "nvars")
coef(fit, lambda = 0.05)