I'm having some trouble understanding how to use performance equations with the filteredsummaries of ipiData2. What I want to do is return the absolute values of a 15m average of pi data for 1 month of data then use the ipiValues2.summaries to return the 1 day max of those values.

Hi Vilet,

The performance equation that is used with FilterSummaries method is meant to be a filter condition to filter away values that you do not want to include in the summary calculation. The equation should evaluate to a boolean result where the value is included when equation evaluates to true, and value is filter when the equation is false.

The standard syntax for Performance Equation (PE) applies. If you are not sure about the equation syntax, you can refer to the

PE Reference Manualavailable on theLibrarysectionWhat I understand from your description is that you were intending to use the PE to get the absolute value of the 15m average calculation result? How about using the

IPICalculation.ExpressionSummariesmethod instead? This method is mean to perform a summary calculation on the values from a PE, hence different from the summary calculation methods supported by PIData or IPIData2.