Shinyapp for Speed-Dist Prediction

Yigang
April 01, 2021

Introduction

Background

The data give the speed of cars and the distances taken to stop. Note that the data were recorded in the 1920s.

Source

Ezekiel, M. (1930) Methods of Correlation Analysis. Wiley.

Goal of This Application

Calculate and Visualize the predicted stopping distances of cars by user designated speed.

Algorithm of Processing Data

  • Use lm function to build a linear regression model
lm(dist ~ speed, data = cars)


Call:
lm(formula = dist ~ speed, data = cars)

Coefficients:
(Intercept)        speed  
    -17.579        3.932

APP FUNCTIONALITY

  • Input speed value by dragging the bar
  • Predicted stopping distance will be shown on the main panel
  • Input value and prediction highlighted on the graph.

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Thank You

References

McNeil, D. R. (1977) Interactive Data Analysis. Wiley.

Shinyapp link

https://nocturnes92.shinyapps.io/Cars/