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Tools for Post-Processing Class Probability Estimates

Models can be improved by post-processing class probabilities, by: recalibration, conversion to hard probabilities, assessment of equivocal zones, and other activities. 'probably' contains tools for conducting these operations.

Readme

probably

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Introduction

probably contains tools to facilitate activities such as:

  • Conversion of probabilities to discrete class predictions.

  • Investigating and estimating optimal probability thresholds.

  • Inclusion of equivocal zones where the probabilities are too uncertain to report a prediction.

Installation

You can install probably from CRAN with:

install.packages("probably")

You can install the development version of probably from GitHub with:

devtools::install_github("topepo/probably")

Examples

Good places to look for examples of using probably are the vignettes.

  • vignette("equivocal-zones", "probably") discusses the new class_pred class that probably provides for working with equivocal zones.

  • vignette("where-to-use", "probably") discusses how probably fits in with the rest of the tidymodels ecosystem, and provides an example of optimizing class probability thresholds.

Functions in probably

Name Description
make_class_pred Create a class_pred vector from class probabilities
threshold_perf Generate performance metrics across probability thresholds
class_pred Create a class prediction object
is_class_pred Test if an object inherits from class_pred
reportable_rate Calculate the reportable rate
locate-equivocal Locate equivocal values
reexports Objects exported from other packages
vec_cast.class_pred Cast a class_pred vector to a specified type
vec_type2.class_pred Find the common type for a class_pred and another object
as_class_pred Coerce to a class_pred object
vec_proxy_equal.class_pred Equality for class_pred
levels.class_pred Extract class_pred levels
append_class_pred Add a class_pred column
segment_naive_bayes Image segmentation predictions
species_probs Predictions on animal species
probably-package probably: Tools for Post-Processing Class Probability Estimates
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Vignettes of probably

Name
equivocal-zones.Rmd
where-to-use.Rmd
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Details

URL https://github.com/tidymodels/probably/
BugReports https://github.com/tidymodels/probably/issues
License GPL-2
Encoding UTF-8
LazyData true
ByteCompile true
RoxygenNote 6.1.1
VignetteBuilder knitr
NeedsCompilation no
Packaged 2019-03-07 17:24:18 UTC; davis
Repository CRAN
Date/Publication 2019-03-07 17:40:08 UTC

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