Producing High-Quality Figures Using SAS/GRAPH and ODS Graphics Procedures

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4

Scatter and Jittered Scatter Plots

4.1 Introduction

A scatter plot is “a type of diagram using Cartesian coordinates to display

values for two variables for a set of data. The data is displayed as a collec-

tion of points, each having the value of one variable determining the posi-

tion on the horizontal axis and the value of the other variable determining

the position on the vertical axis” (Wikipedia). Scatter plots are often used

to visualize all individual data points, not just mean values as in line plots.

Inmany circumstances, scatter plots might be preferred to line plots because

they allow us to visualize all data points, includi