The following data set contains the input data that are used in this example:
data xy_data;
input x y;
datalines;
0.0 1.0
0.5 0.9
1.0 0.7
1.5 1.5
1.9 2.0
2.5 2.4
3.0 3.2
3.5 2.0
4.0 2.7
4.5 3.5
5.0 1.0
5.5 4.0
6.0 3.6
6.6 2.7
7.0 5.7
7.6 4.6
8.5 6.0
9.0 6.8
10.0 7.3
;