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So I am trying to build a PERCENTRANK column that is similar to Excel - for a given value (that may not appear in the array) it returns the rank expressed as a percentage.
I came across this post which is awesome and does what I'm looking for:
https://community.powerbi.com/t5/Desktop/PERCENTRANK-Inclusive/td-p/81208
PercentRank.INC = VAR PercentRankArgument = [PercentRank Argument] RETURN IF ( // Only evaluate PercentRank for values between min/max of Number[Number] inclusive AND ( PercentRankArgument >= MIN ( Number[Number] ), PercentRankArgument <= MAX ( Number[Number] ) ), // Filter Number to values less than the PercentRankArgument VAR NumberLessThanArgument = FILTER ( Number, Number[Number] < PercentRankArgument ) VAR NumberGreaterThanOrEqualArgument = FILTER ( Number, Number[Number] >= PercentRankArgument ) // RankLower = the count of Numbers less than PercentRankArgument, and is used later for interpolation of ranks VAR RankLower = COUNTROWS ( NumberLessThanArgument ) // NumberLower = the largest Number < PercentRankArgument, used for interpolation VAR NumberLower = MAXX ( NumberLessThanArgument, Number[Number] ) // NumberUpper = the smallest Number >= PercentRankArgument, used for interpolation VAR NumberUpper = MINX ( NumberGreaterThanOrEqualArgument, Number[Number] ) // PercentRankArgumentRank = the rank of PercentRankArgument over the Number table, which is just RankLower + 1. // This is the same rank as NumberUpper in the Number table itself. VAR PercentRankArgumentRank = RankLower + 1 // InterpolationFraction = fraction that PercentRankArgument is from NumberLower to NumberUpper VAR InterpolationFraction = DIVIDE ( PercentRankArgument - NumberLower, NumberUpper - NumberLower ) // Calculate the interpolated rank VAR RankInterpolated = RankLower + InterpolationFraction * ( PercentRankArgumentRank - RankLower ) // Get the count of Numbers VAR NumberCount = COUNT ( Number[Number] ) // Final PercentRank is (RankInterpolated - 1)/(NumberCount - 1) VAR PercentRankOutput = DIVIDE ( RankInterpolated - 1, NumberCount - 1 ) RETURN PercentRankOutput
PercentRank Argument = IF ( HASONEVALUE( 'Test Number'[Test Number] ), VALUES ( 'Test Number'[Test Number] ) )
However, I have one caveat that I would like to add. I want to be able to do this calculation by row. So my table has stock tickers. I want to be able to do the above calculation by stock ticker. I attempted to alter the first part but got an error saying something along the lines of no values were returned:
PercentRank.INC = VAR PercentRankArgument = [PercentRank Argument] RETURN IF ( // Only evaluate PercentRank for values between min/max of Number[Number] inclusive AND ( PercentRankArgument >= CALCULATE(MIN ( Number[Number] ),FILTER(Number[Ticker] = EARLIER Number[Ticker]), PercentRankArgument <= CALCULATE(MAX ( Number[Number] ),FILTER(Number[Ticker] = EARLIER Number[Ticker])
Hi @Anonymous,
Could you please post me some sample file to have a test and post your desired result if possible?
Regards,
Daniel He
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