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Revision as of 13:47, 22 July 2010
, 13:47, 22 July 2010→Your Tasks
* Count the number of markers being examined. Let's call this number M.
* Count the number of markers being examined. Let's call this number M.
* Sort observed p-values, from smallest to largest.
* Sort observed p-values, from smallest to largest.
* Match each expected p-value with an expected p-value, which is simply its rank divided by M.
* Match each expected p-value with an expected p-value, which is simply its rank divided by M+1.
* Because we are most interested in the smallest p-value, transform observed and expected p-values using the -log() function.
* Plot expected p-values along the X axis and actual p-values along the X-axis.
* Plot expected p-values along the X axis and actual p-values along the X-axis.
