R - Scatterplot

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Data Visualisation - Scatterplot

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Matrix

• Useful way to see all plots for a two-class variable

pairs(dataframe,col=dataframe$TwoClassVariable)

Package

Graphics

• Standard scatterplot

plot(data$variable1 ~ data$variable2)

• Standard scatterplot with regression line

abline(lm(data$variable1 ~ data$variable2), col = "green")

• Scatterplot matrix

pairs(~data$variable1 + data$variable2 + data$variable3, cex.labels = 1.2)

gclus

• Color scatterplot matrix, colored and ordered by magnitude of r

base <- data[3:8]
base.r <- abs(cor(base))
base.color <- dmat.color(base.r)
base.order <- order.single(base.r) 
cpairs(base, base.order, panel.colors = base.color, gap = .5,
       main = "Variables Ordered and Colored by Correlation")

rgl

• Scatterplot in 3D

plot3d(data$variable2, data$variable3, data$variable1, main = "3D Plot")

ggplot

Scatterplot:

• geom: point
• Stat: identity
• Scale: linear
• Coordinate system: Cartesian