forwardfeatureselection: Forward Feature Selection. Performs forward feature selection...

In feamiR: Classification and Feature Selection for microRNA/mRNA Interactions

Description

Forward Feature Selection. Performs forward feature selection on the given list of features, placing them in order of discriminative power using a given model on the given dataset up to the accuracy plateau.

Usage

forwardfeatureselection(
  model = feamiR::svmlinear,
  training,
  test,
  featurelist,
  includePlot = FALSE
)

Arguments

model	The ML models used to classify the data, typically SVM with a given kernel
training	Training dataset as a data.frame with classification column and column for each feature.
test	Test dataset with matching columns to training.
featurelist	List of features to order
includePlot	Show number of features vs accuracy line plot (default:FALSE)

Value

Ordered list of most discriminative features when classifying the dataset along with training and test accuracy, sensitivity and specificity

Examples

data_train = data.frame(
      classification=as.factor(c(1,1,0,0,1,1,0,0,1,1)),
      A=c(1,1,1,0,0,0,1,1,1,0),
      B=c(0,1,1,0,1,1,0,1,1,0),
      C=c(0,0,1,0,0,1,0,0,1,0),
      D=c(0,1,1,0,0,0,1,0,0,0),
      E=c(1,0,1,0,0,1,0,1,1,0))
data_test = data.frame(
      classification=as.factor(c(1,1,0,0,1,1,1,0)),
      A=c(0,0,0,1,0,0,0,1),
      B=c(1,1,1,0,0,1,1,1),
      C=c(0,0,1,1,0,0,1,1),
      D=c(0,0,1,1,0,1,0,1),
      E=c(0,0,1,0,1,0,1,1))
listoffeatures = colnames(data_train)[colnames(data_train)!='classification']
forwardfeatureselection(feamiR::svmlinear,data_train,data_test,listoffeatures)

feamiR documentation built on Jan. 19, 2021, 9:08 a.m.