Parameters | Expression Parameters | Annotation Position Variable

Annotation Position Variable
Use this field to specify the variable whose values indicate the genetic position of each of the SNPs or probesets on the chromosome .
This variable is specified here when this information is not included in the Input SAS Data Set .
When this variable is specified along with an Annotation Chromosome Variable , negative log 10 p-value results are plotted by chromosome and position.
To Specify the Position Variable:
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All of the variables in the specified input data set are displayed in the Available Variables field.
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Click to add the highlighted variable to the Annotation Position Variable field, as shown below: