The data was extracted from the 1974 Motor Trend US magazine, and comprises fuel consumption and 10 aspects of automobile design and performance for 32 automobiles (1973–74 models).

library(datasets)
suppressPackageStartupMessages(library(plotly))

## Warning: package 'plotly' was built under R version 3.4.4

rawData <- mtcars

A look at the data

head(rawData)

##                    mpg cyl disp  hp drat    wt  qsec vs am gear carb
## Mazda RX4         21.0   6  160 110 3.90 2.620 16.46  0  1    4    4
## Mazda RX4 Wag     21.0   6  160 110 3.90 2.875 17.02  0  1    4    4
## Datsun 710        22.8   4  108  93 3.85 2.320 18.61  1  1    4    1
## Hornet 4 Drive    21.4   6  258 110 3.08 3.215 19.44  1  0    3    1
## Hornet Sportabout 18.7   8  360 175 3.15 3.440 17.02  0  0    3    2
## Valiant           18.1   6  225 105 2.76 3.460 20.22  1  0    3    1

Processing the data

suppressPackageStartupMessages(library(dplyr))
data <- rawData %>%
      select(mpg, gear)

data$gear <- as.factor(data$gear)

p <- plot_ly(data, x =~mpg, color = ~gear, type = "box")
p