Bandwidth

Use this text field to specify the number of neighboring markers to include in the sliding window. These values are used as the bandwidth for applying the p-value adjustment, that is the number of marker p-values on each side of each marker to include in the adjustment. A bandwidth of 0 is specified by default.

A single value or a range of values can be specified, as described below:

1

Type a single value in the text box to specify the number of markers to either side of each individual marker to include. For example, typing the value 1 in this text box indicates that sliding windows containing each individual marker and one marker on each side are formed for smoothing the p-values.

2

Specify a range of markers.

•

Use the statement: X to Y where X, Y, and Z are all nonnegative integers to specify a range of bandwidths. For example, type 3 to 5 to combine p-values by using bandwidths 3, 4, and 5, which create sliding windows of size 7, 9, and 11 markers, respectively

•

Use the statement X to Y by Z, where X, Y, and Z are all nonnegative integers, to specify a more select range. For example, type 5 to 30 by 5 to combine p-values by using bandwidths 5, 10, 15, 20, 25, and 30, which create sliding windows of size 11, 21, 31, 41, 51, and 61 markers, respectively.

3

Combine both single values and ranges to generate specific bandwidths. For example, type 1, 2, 5 to 15 by 5, 18 to combine p-values by using bandwidths 1, 2, 5, 10, 15, and 18, which create sliding windows of size 3, 5, 11, 21, 31, and 37, respectively.

To Specify the Bandwidth(s):

8

Type the desired bandwidth values in the test box.

For Additional Information:

See the SAS PROC PSMOOTH documentation for more information.