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MedianIf
Example: [Newsgroup Microsoft.Public.Excel.Programming 8-Mar-2009 22:14] Well, I have a list of data from an experiment I did which includes subjects, different stimuli and reaction time to the stimuli (the stimuli comes in numbers). Each subject had a number of stimuli, and he had to repeat the same thing 10 times. for example: subject A had 100 stimuli, from which 10 stimuli where number 1, another 10 where number 2 and so on... The list of the data is a big array that includes the following: Column A - the subject's name (in a coded form), Column B is the stimulous number, and Column C is the reaction time to the stimulous. I'm searching for a formula (i don't care if the solution is in a form of a formula or VBA), that would return the median of the reaction time to a certain stimuli for a specific subject. Something in the form of 'if Subject = A' and 'Stimuli = 1" then return the median of the reaction times.
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Function Medianif(rcond As Range, _
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scond As String, _
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rmedian As Range) As Double
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'Medianif calculates the median of all values in range rmedian
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'if their corresponding values in range rcond are equal to
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'comparison value scond.
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'Ranges rcond and rmedian have to be of same size. They can be
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'multi-range (entered as named ranges, for example) but then
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'all corresponding areas have to have identical sizes, too.
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'Reverse(moc.liborplus.www) V0.1 25-May-2008
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Dim i As Long, j As Long
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Dim b As Boolean
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Dim rRes As Range
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b = False
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For i = 1 To rcond.Areas.Count
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For j = 1 To rcond.Areas(i).Count
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If rcond.Areas(i)(j).Value = scond Then
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If b Then
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Set rRes = Application.Union(rRes, rmedian.Areas(i)(j))
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Else
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Set rRes = rmedian.Areas(i)(j)
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b = True
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End If
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End If
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Next j
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Next i
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If b Then
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Medianif = Application.WorksheetFunction.Median(rRes)
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Else
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Medianif = CVErr(xlErrNum)
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End If
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End Function
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