Parameters | Expression Parameters | Position Variable

Position Variable
Use this field to specify the variable whose values indicate position on a linkage group or chromosome .
When this variable is specified along with a 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 Position Variable field, as shown below: