An example for the jitter effect
- Animation
- R code

An example for the jitter effect

Adding a small noise to the original data might be helpful in visualizing data, especially for categorical data. The scatterplot of two categorical variables just m x n points, from which we do not know how many sample points are actually in these graphical symbols. If we jitter() the data before drawing a scatterplot, the effect can be better.

Animation

Jitter Effect for Categorical Data

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Some small random numbers are added to the original data (which only take values on {1, 2, 3}). If we do not jitter the data, the scatterplot will merely consist of nine points. As the process of jittering is random, this animation has shown its 30 possible results.

R code

Refer to the example introduced in the start page of R package ''animation''.