The GCONTOUR Procedure

Example 2: Labeling Contour Lines

Procedure features:

PLOT statement options:

	AUTOLABEL=
	HAXIS=
	LEGEND=
	LEVELS=
	VAXIS=

Other features:

AXIS statement

LEGEND statement

SYMBOL statement

Data set:

REFLIB.CLAY2

Sample library member:

GR14N02

[IMAGE]

This example modifies Generating a Simple Contour Plot to label contour levels with the AUTOLABEL option. When AUTOLABEL is used, the SYMBOL statement controls the labels and attributes of contour lines. In this example, SYMBOL1 defines a text label for the lowest contour level. Each remaining contour line gets the default label, which is the contour variable's value at that contour level. All the contour lines are solid, which is the default line type for the SYMBOL statement.

This example also uses AXIS statements to limit the plot to one of the contour areas from the output of Generating a Simple Contour Plot, and it uses a LEGEND statement to move the legend so the procedure has more room for displaying the y axis.

libname reflib 'SAS-data-library'; goptions reset=global gunit=pct border cback=white colors=(black blue green red) ftext=swiss ftitle=swissb htitle=6 htext=4;

title1 'Clay Content at Site A'; footnote1 j=r 'GR14N02 ';

axis1 order=(-10 to -4 by 2); axis2 order=(-10 to 2 by 2);

legend1 position=(right middle) label=(position=top) across=1;

symbol1 height=2.5 font=swissb value='lowest' color=red; symbol2 height=2.5 step=25pct color=black; symbol3 height=2.5 color=blue; symbol4 height=2.5 color=green;

proc gcontour data=reflib.clay2; plot y*x=pct_clay / levels=10 to 90 by 20 autolabel=(check=none) haxis=axis1 vaxis=axis2 legend=legend1; run; quit;

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