parsnip 0.1.2
Breaking Changes
parsnip
now has options to set specific types of predictor encodings for different models. For example,ranger
models run usingparsnip
andworkflows
do the same thing by not creating indicator variables. These encodings can be overridden using theblueprint
options inworkflows
. As a consequence, it is possible to get a different model fit that previous versions ofparsnip
. More details about specific encoding changes are below. (#326)
Other Changes
-
tidyr
>= 1.0.0 is now required. -
SVM models produced by
kernlab
now use the formula method (see breaking change notice above). This change was due to howksvm()
made indicator variables for factor predictors (with one-hot encodings). Since the ordinary formula method did not do this, the data are passed as-is toksvm()
so that the results are closer to what one would get ifksmv()
were called directly. -
MARS models produced by
earth
now use the formula method. -
For
xgboost
, a one-hot encoding is used when indicator variables are created. -
Under-the-hood changes were made so that non-standard data arguments in the modeling packages can be accommodated. (#315)
New Features
-
A new main argument was added to
boost_tree()
calledstop_iter
for early stopping. Thexgb_train()
function gained arguments for early stopping and a percentage of data to leave out for a validation set. -
If
fit()
is used and the underlying model uses a formula, the actual formula is pass to the model (instead of a placeholder). This makes the model call better. -
A function named
repair_call()
was added. This can help change the underlying modelscall
object to better reflect what they would have obtained if the model function had been used directly (instead of viaparsnip
). This is only useful when the user chooses a formula interface and the model uses a formula interface. It will also be of limited use when a recipes is used to construct the feature set inworkflows
ortune
. -
The
predict()
function now checks to see if required modeling packages are installed. The packages are loaded (but not attached). (#249) (#308) (tidymodels/workflows#45) -
The function
req_pkgs()
is a user interface to determining the required packages. (#308)