fdPlotConfusionMatrix: Interactive Confusion Matrix

In alteryx/flightdeck: Interactive Dashboards for Predictive Models

Description

Interactive Confusion Matrix

Usage

fdPlotConfusionMatrix(x, class = "table table-bordered", digits = 3)

Arguments

x	confusion matrix with row and column names representing classes. It is expected that the rownames represent actual classes while column names represent the predicted classes
class	html class to style the confusion matrix table
digits	number of digits to display in the tooltip

Examples

library(flightdeck)
library(rpart)
mod <- rpart(Species ~ ., data = iris)
outcome <- as.character(attr(mod, 'ylevels')[mod$y])
pred <- predict(mod, type = "class")

# Example 1: Table
ctable <- table(outcome, pred)

if (interactive()){
  fdRowBox(width = 6,
    fdPlotConfusionMatrix(ctable),
    title = 'Confusion Matrix',
    footer = paste(
      'Numbers in parantheses indicate % of observations', 
      'correctly classified. Hover for more details'
    ) 
  ) %>% 
  fdPreview(wrap = 'none')
}

# Example 2: Matrix
cmat2 <- matrix(data = c(63, 3, 4, 33), nrow = 2, ncol = 2,
  dimnames = list(
    c('Actual Positive', 'Actual Negative'),
    c('Predicted Positive', 'Predicted Negative')
  )
)

fdPlotConfusionMatrix(cmat2) %>%
  fdPreview

alteryx/flightdeck documentation built on May 12, 2019, 1:39 a.m.