carsInteractive

Nikolas Giagtzoglou
October 26th, 2014

Application Cars Interactive

mtcars dataset is small and esay to manipulate
mtcars dataset produces nice, simple plots
mtcars dataset has been used in linear regression classes

Aim: to generate quick diagnostic tests using both plots...

For example:

plot(mpg~wt, mtcars)

plot of chunk unnamed-chunk-1

...and linear regression calculations

z<-lm(mpg~wt, mtcars)
print(rbind(c("Intercept:", "Slope:"), as.numeric(round(z$coefficients,2))))

     [,1]         [,2]    
[1,] "Intercept:" "Slope:"
[2,] "37.29"      "-5.34"

The applications lives at:

http://nikolas.shinyapps.io/calculate_linear_fit_coeffcients_in_cars_dataset

Many thanks to Scientificdata for the inspiration!