A glance() method for model_fit objects was added (#325)
Specific tidy() methods for glmnet models fit via parsnip were created so that the coefficients for the specific fitted parsnip model are returned.
glmnet models were fitting two intercepts (#349)
The various update() methods now work with engine-specific parameters.
parsnip now has options to set specific types of predictor encodings for different models. For example, ranger models run using parsnip and workflows do the same thing by not creating indicator variables. These encodings can be overridden using the blueprint options in workflows. As a consequence, it is possible to get a different model fit that previous versions of parsnip. More details about specific encoding changes are below. (#326)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 how ksvm() 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 to ksvm() so that the results are closer to what one would get if ksmv() 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)
A new main argument was added to boost_tree() called stop_iter for early stopping. The xgb_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 models call object to better reflect what they would have obtained if the model function had been used directly (instead of via parsnip). 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 in workflows or tune.
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)
liquidSVM was added as an engine for svm_rbf() (#300)tidy() was broken on R 4.0.glmnet model.glmnet was removed as a dependency since the new version depends on 3.6.0 or greater. Keeping it would constrain parsnip to that same requirement. All glmnet tests are run locally.
A set of internal functions are now exported. These are helpful when creating a new package that registers new model specifications.
nnet was added as an engine to multinom_reg() #209parsnip and the underlying model function) for spark boosted trees and some keras models. See 897c927.The time elapsed during model fitting is stored in the $elapsed slot of the parsnip model object, and is printed when the model object is printed.
Some default parameter ranges were updated for SVM, KNN, and MARS models.
The model udpate() methods gained a parameters argument for cases when the parameters are contained in a tibble or list.
fit_control() is soft-deprecated in favor of control_parsnip().
A bug was fixed standardizing the output column types of multi_predict and predict for multinom_reg.
A bug was fixed related to using data descriptors and fit_xy().
A bug was fixed related to the column names generated by multi_predict(). The top-level tibble will always have a column named .pred and this list column contains tibbles across sub-models. The column names for these sub-model tibbles will have names consistent with predict() (which was previously incorrect). See 43c15db.
A bug was fixed standardizing the column names of nnet class probability predictions.
Test case update due to CRAN running extra tests (#202)
Unplanned release based on CRAN requirements for Solaris.
The method that parsnip stores the model information has changed. Any custom models from previous versions will need to use the new method for registering models. The methods are detailed in ?get_model_env and the package vignette for adding models.
The mode needs to be declared for models that can be used for more than one mode prior to fitting and/or translation.
For surv_reg(), the engine that uses the survival package is now called survival instead of survreg.
For glmnet models, the full regularization path is always fit regardless of the value given to penalty. Previously, the model was fit with passing penalty to glmnet’s lambda argument and the model could only make predictions at those specific values. (#195)
add_rowindex() can create a column called .row to a data frame.
If a computational engine is not explicitly set, a default will be used. Each default is documented on the corresponding model page. A warning is issued at fit time unless verbosity is zero.
nearest_neighbor() gained a multi_predict method. The multi_predict() documentation is a little better organized.
A suite of internal functions were added to help with upcoming model tuning features.
A parsnip object always saved the name(s) of the outcome variable(s) for proper naming of the predicted values.
Small release driven by changes in sample() in the current r-devel.
A “null model” is now available that fits a predictor-free model (using the mean of the outcome for regression or the mode for classification).
fit_xy() can take a single column data frame or matrix for y without error
varying_args() now has a full argument to control whether the full set of possible varying arguments is returned (as opposed to only the arguments that are actually varying).
fit_control() not returns an S3 method.
For classification models, an error occurs if the outcome data are not encoded as factors (#115).
The prediction modules (e.g. predict_class, predict_numeric, etc) were de-exported. These were internal functions that were not to be used by the users and the users were using them.
An event time data set (check_times) was included that is the time (in seconds) to run R CMD check using the "r-devel-windows-ix86+x86_64` flavor. Packages that errored are censored.
varying_args() now uses the version from the generics package. This means that the first argument, x, has been renamed to object to align with generics.
For the recipes step method of varying_args(), there is now error checking to catch if a user tries to specify an argument that cannot be varying as varying (for example, the id) (#132).
find_varying(), the internal function for detecting varying arguments, now returns correct results when a size 0 argument is provided. It can also now detect varying arguments nested deeply into a call (#131, #134).
For multinomial regression, the .pred_ prefix is now only added to prediction column names once (#107).
For multinomial regression using glmnet, multi_predict() now pulls the correct default penalty (#108).
Confidence and prediction intervals for logistic regression were only computed the intervals for a single level. Both are now computed. (#156)
First CRAN release
set_engine(). There is no engine argumentothers has been replaced by ...regularization was changed to penalty in a few models to be consistent with this change.predict methods, the earth package will need to be attached to be fully operational.snake_case, newdata was changed to new_data.predict_raw method was added.fit interface was previously used to cover both the x/y interface as well as the formula interface. Now, fit() is the formula interface and fit_xy() is for the x/y interface.NEWS.md file to track changes to the package.predict methods were overhauled to be consistent.