alookr (version 0.5.0)

plot_performance: Visualization for ROC curve

Description

plot_performance() visualizes a plot to ROC curve that separates model algorithm.

Usage

plot_performance(model)

Value

There is no return value. Only the plot is drawn.

Arguments

model

A model_df. results of predicted model that created by run_predict().

Details

The ROC curve is output for each model included in the model_df class object specified as a model argument.

Examples

# \donttest{
library(dplyr)

# Divide the train data set and the test data set.
sb <- rpart::kyphosis %>%
  split_by(Kyphosis)

# Extract the train data set from original data set.
train <- sb %>%
  extract_set(set = "train")

# Extract the test data set from original data set.
test <- sb %>%
  extract_set(set = "test")

# Sampling for unbalanced data set using SMOTE(synthetic minority over-sampling technique).
train <- sb %>%
  sampling_target(seed = 1234L, method = "ubSMOTE")

# Cleaning the set.
train <- train %>%
  cleanse

# Run the model fitting.
result <- run_models(.data = train, target = "Kyphosis", positive = "present")

# Predict the model.
pred <- run_predict(result, test)

# Plot ROC curve
plot_performance(pred)
# }