bayesRegressSimple {mmb}

Perform simple (network) Bayesian regression.

Description

Uses simple Bayesian inferencing to segment the data given the conditional features. Then estimates a density over the remaining values of the target feature and returns the most likely value using a maximum a posteriori estimate of the kernel (returning its mode).

Usage

bayesRegressSimple(
  df,
  features,
  targetCol,
  selectedFeatureNames = c(),
  retainMinValues = 2,
  regressor = NULL
)

Arguments

df

data.frame

features

data.frame with bayes-features. One of the features needs to be the label-column (not required or no value required).

targetCol

string with the name of the feature that represents the label (here the target variable for regression).

selectedFeatureNames

vector default c(). Vector of strings that are the names of the features the to-predict label depends on. If an empty vector is given, then all of the features are used (except for the label). The order then depends on the features' order.

retainMinValues

integer to require a minimum amount of data points when segmenting the data feature by feature.

regressor

Function that is given the collected values for regression and thus finally used to select a most likely value. Defaults to the built-in estimator for the empirical PDF and returns its argmax. However, any other function can be used, too, such as min, max, median, average etc. You may also use this function to obtain the raw values for further processing.

Author(s)

Sebastian Hönel [e-mail]

References

Scutari M (2010). “Learning Bayesian Networks with the bnlearn R Package.” Journal of Statistical Software, 35(3), 1–22. doi: 10.18637/jss.v035.i03.

See Also

mmb::bayesInferSimple()

Examples

feat1 <- mmb::createFeatureForBayes(
  name = "Sepal.Length", value = mean(iris$Sepal.Length))
feat2 <- mmb::createFeatureForBayes(
  name = "Sepal.Width", value = mean(iris$Sepal.Width))

# Note how we do not require "Petal.Length" among the features when regressing:
mmb::bayesRegressSimple(df = iris, features = rbind(feat1, feat2),
  targetCol = "Petal.Length")