risk: Methods to Extract and Plot the (Minimal) Risk
In CoxFlexBoost: Boosting Flexible Cox Models (with Time-Varying Effects)

Description Usage Arguments Details Value See Also Examples

Methods to extract the risk from models fitted via cfboost and to print and show the results.

## S3 method for class 'cfboost'
risk(object, ...)
## S3 method for class 'oobag'
plot(x, xlab = "iteration",
     ylab = "risk (= - log likelihood) in validation sample",
     type = "l", mstop = TRUE, xlim = NULL, ...)
## S3 method for class 'inbag'
plot(x, xlab = "iteration",
     ylab = "risk (= - log likelihood) in learning sample",
     type = "l", mstop = TRUE, xlim = NULL, ...)
## S3 method for class 'oobag'
print(x, print = TRUE, ...)
## S3 method for class 'inbag'
print(x, print = TRUE, ...)

`object`	an object of class `cfboost`.
`x`	an object of either class `oobag` or `inbag`.
`xlab`	A title for the x axis.
`ylab`	A title for the y axis.
`type`	type of plot to be drawn. See `plot` for more details.
`mstop`	logic. If `mstop = TRUE` the optimal stopping iteration is given in the x axis and a vertical line is added to the plot.
`xlim`	the limits of the x axis, see `plot.default`. Note: reversed axis are not allowed.
`print`	logic. If `print = TRUE` the result is written to the screen. Otherwise the results are only returned invisible.
`...`	further arguments to be pased on.

The function risk allows to extract the risk (vector) from an object (of class cfboost).

Depending on the type of risk (oobag or inbag) different plotting facilities exist. Note however, that plot.inbag is just a wrapper for plot.oobag with different defaults.

In the same manner a print method is defined for oobag and inbag risk.

risk returns the empirical inbag or out-of-bag risk from a cfboost object.

print returns the given object invvisble.

for other methods for cfboost objects see methods. See cv for cross-validated risk.