gbm.object {gbm} | R Documentation |
These are objects representing fitted gbm
s.
initF |
the "intercept" term, the initial predicted value to which trees make adjustments |
fit |
a vector containing the fitted values on the scale of regression function (e.g. log-odds scale for bernoulli, log scale for poisson) |
train.error |
a vector of length equal to the number of fitted trees containing the value of the loss function for each boosting iteration evaluated on the training data |
valid.error |
a vector of length equal to the number of fitted trees containing the value of the loss function for each boosting iteration evaluated on the validation data |
cv.error |
if |
oobag.improve |
a vector of length equal to the number of fitted trees
containing an out-of-bag estimate of the marginal reduction in the expected
value of the loss function. The out-of-bag estimate uses only the training
data and is useful for estimating the optimal number of boosting iterations.
See |
trees |
a list containing the tree structures. The components are best
viewed using |
c.splits |
a list of all the categorical splits in the collection of
trees. If the |
The following components must be included in a legitimate gbm
object.
Greg Ridgeway gregr@rand.org