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Applied Statistics Using SPSS, STATISTICA, MATLAB and R

Applied Statistics Using SPSS, STATISTICA, MATLAB and R

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2.2 Presenting the Data 55<br />

The s, c arguments of <strong>MATLAB</strong> scatter <strong>and</strong> scatter3 are the size <strong>and</strong><br />

colour of the marks, respectively.<br />

The plot.default function is the x-y scatter plot function of R <strong>and</strong> has<br />

several configuration parameters available (colours, type of marks, etc.). The R<br />

Graphics package has no 3D plot available.<br />

<br />

Figure 2.20. Scatter plot (obtained with <strong>STATISTICA</strong>) of the variables ART <strong>and</strong><br />

PRT of the cork stopper dataset.<br />

Figure 2.21. 3D plot (obtained with <strong>STATISTICA</strong>) of the variables ART, PRT <strong>and</strong><br />

N of the cork stopper dataset.<br />

The most popular graphical tools for multivariate data are the scatter plots for<br />

bivariate data <strong>and</strong> the 3D plots for trivariate data. Examples of these plots, for the<br />

cork stopper data, are shown in Figures 2.20 <strong>and</strong> 2.21. As a matter of fact, the 3D

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