R: make predictions from a "cv.glmnet" object.

predict.cv.glmnet {glmnet} | R Documentation

## make predictions from a "cv.glmnet" object.

### Description

This function makes predictions from a cross-validated glmnet model, using the stored `"glmnet.fit"` object, and the optimal value chosen for `lambda`.

### Usage

    ## S3 method for class 'cv.glmnet'
    predict(object, newx, s=c("lambda.1se","lambda.min"),...)
    ## S3 method for class 'cv.glmnet'
    coef(object,s=c("lambda.1se","lambda.min"),...)

### Arguments

`object` | Fitted `"cv.glmnet"` object.
`newx` | Matrix of new values for `x` at which predictions are to be made. Must be a matrix; can be sparse as in `Matrix` package. See documentation for `predict.glmnet`.
`s` | Value(s) of the penalty parameter `lambda` at which predictions are required. Default is the value `s="lambda.1se"` stored on the CV `object`. Alternatively `s="lambda.min"` can be used. If `s` is numeric, it is taken as the value(s) of `lambda` to be used.
`...` | Not used. Other arguments to predict.

### Details

This function makes it easier to use the results of cross-validation to make a prediction.

### Value

The object returned depends the ... argument which is passed on to the `predict` method for `glmnet` objects.

### Author(s)

Jerome Friedman, Trevor Hastie and Rob Tibshirani
Maintainer: Trevor Hastie <hastie@stanford.edu>

### References

Friedman, J., Hastie, T. and Tibshirani, R. (2008) Regularization Paths for Generalized Linear Models via Coordinate Descent, Journal of Statistical Software, Vol. 33, Issue 1, Feb 2010
http://www-stat.stanford.edu/~hastie/Papers/glmnet.pdf
http://www.jstatsoft.org/v33/i01/

### See Also

`glmnet`, and `print`, and `coef` methods, and `cv.glmnet`.

### Examples

    x=matrix(rnorm(100*20),100,20)
    y=rnorm(100)
    cv.fit=cv.glmnet(x,y)
    predict(cv.fit,newx=x[1:5,])
    coef(cv.fit)
    coef(cv.fit,s="lambda.min")
    predict(cv.fit,newx=x[1:5,],s=c(0.001,0.002))

[Package glmnet version 2.0-5 Index]