data <- mtcars
data[1:3,]
##                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
#Simple Correlation scatterplot 
plot(data$mpg, data$wt, col = data$cyl)

#Scatterplot Matrix
plot(data[,4:11])

#Matrix with curves showing correlation
pairs(data[,4:11], panel=panel.smooth)

#Respresenting Correlations with symbols
symbols(data$disp, data$hp,
        squares=sqrt(data$wt), inches=0.5)