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Basic Analysis and Graphing - SAS

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374 Creating Contour Plots Chapter 14<br />

Example of a Contour Plot<br />

Figure 14.3 The Contour Plot Launch Window<br />

Table 14.1 Description of the Contour Plot Launch Window<br />

Y<br />

X<br />

By<br />

Columns assigned to the Y role are used as variables to determine the<br />

contours of the plot. You must specify at least one, <strong>and</strong> you can specify<br />

more than one.<br />

You can also assign a column with a formula to this role. If you do so,<br />

the formula should be a function of exactly two variables. Those<br />

variables should be the x variables entered in the Launch window.<br />

Columns assigned to the X role are used as the variables for the x- <strong>and</strong><br />

y-axes. You must specify exactly two columns for X.<br />

This option produces a separate graph for each level of the By variable.<br />

If two By variables are assigned, a separate graph for each possible<br />

combination of the levels of both By variables is produced.<br />

Options:<br />

Contour Values<br />

Fill Areas<br />

Specify your own number of levels <strong>and</strong> level increments.<br />

See “Contour Specification” on page 377.<br />

Fill the areas between contour lines using the contour line colors.

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