Median & Percentile for the range of various lengths

T

trader1011

New Member
Joined
Sep 24, 2013
Messages
7
Hi,

I am trying to calculate the Median & 75th Percentile for the range in array where the range differs in the length. For example, my data looks like the one given below (my data-set is almost 100,000 rows). Now I am trying to find the median and 75th percentile values of a combined set of 3 batches where every next batch will drop the first member and and the next member (Set 1 - Batch no. 1, 2,3 & Set 2 - Batch no. 2, 3, 4 etc.). I have provided the result in the table no. 2.

As one can see from the data-set the length of range (no. of data points for each batch) is varying.

Any help will be appreciated.

Table 1: Data-set

[TABLE="class: outer_border, width: 200"]
<tbody>[TR]
[TD]Batch #[/TD]
[TD]Value[/TD]
[/TR]
[TR]
[TD]1[/TD]
[TD]1[/TD]
[/TR]
[TR]
[TD]1[/TD]
[TD]12[/TD]
[/TR]
[TR]
[TD]1[/TD]
[TD]10[/TD]
[/TR]
[TR]
[TD]1[/TD]
[TD]5[/TD]
[/TR]
[TR]
[TD]2[/TD]
[TD]3[/TD]
[/TR]
[TR]
[TD]2[/TD]
[TD]23[/TD]
[/TR]
[TR]
[TD]2[/TD]
[TD]6[/TD]
[/TR]
[TR]
[TD]3[/TD]
[TD]2[/TD]
[/TR]
[TR]
[TD]3[/TD]
[TD]5[/TD]
[/TR]
[TR]
[TD]4[/TD]
[TD]78[/TD]
[/TR]
[TR]
[TD]4[/TD]
[TD]2[/TD]
[/TR]
[TR]
[TD]4[/TD]
[TD]3[/TD]
[/TR]
[TR]
[TD]4[/TD]
[TD]1[/TD]
[/TR]
[TR]
[TD]4[/TD]
[TD]5[/TD]
[/TR]
[TR]
[TD]5[/TD]
[TD]4[/TD]
[/TR]
[TR]
[TD]5[/TD]
[TD]9[/TD]
[/TR]
[TR]
[TD]6[/TD]
[TD]1[/TD]
[/TR]
[TR]
[TD]6[/TD]
[TD]3[/TD]
[/TR]
[TR]
[TD]6[/TD]
[TD]11[/TD]
[/TR]
[TR]
[TD]7[/TD]
[TD]15[/TD]
[/TR]
</tbody>[/TABLE]

Table 2: Result

[TABLE="class: outer_border, width: 200"]
<tbody>[TR]
[TD]Set (Batch no.)[/TD]
[TD]Median[/TD]
[TD]75th Percentile[/TD]
[/TR]
[TR]
[TD]1-3[/TD]
[TD]5[/TD]
[TD]11[/TD]
[/TR]
[TR]
[TD]2-4[/TD]
[TD]4[/TD]
[TD]10.25[/TD]
[/TR]
[TR]
[TD]3-5[/TD]
[TD]4[/TD]
[TD]7[/TD]
[/TR]
[TR]
[TD]4-6[/TD]
[TD]3.5[/TD]
[TD]9.5[/TD]
[/TR]
[TR]
[TD]5-7[/TD]
[TD]6.5[/TD]
[TD]12[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
</tbody>[/TABLE]
 

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Perhaps:

ABCDEFG
ValueSet: Low BatchSet: High BatchMedian75th Percentile
5
1

<tbody>
[TD="align: center"]1[/TD]
[TD="bgcolor: #FAFAFA"]Batch #[/TD]

[TD="align: right"][/TD]

[TD="align: center"]2[/TD]
[TD="align: right"]1[/TD]
[TD="align: right"]1[/TD]
[TD="align: right"][/TD]
[TD="align: right"]1[/TD]
[TD="align: right"]3[/TD]
[TD="align: right"]5[/TD]
[TD="align: right"]11[/TD]

[TD="align: center"]3[/TD]
[TD="align: right"]1[/TD]
[TD="align: right"]12[/TD]
[TD="align: right"][/TD]
[TD="align: right"]2[/TD]
[TD="align: right"]4[/TD]
[TD="align: right"]4[/TD]
[TD="align: right"]10.25[/TD]

[TD="align: center"]4[/TD]
[TD="align: right"]1[/TD]
[TD="align: right"]10[/TD]
[TD="align: right"][/TD]
[TD="align: right"]3[/TD]
[TD="align: right"]5[/TD]
[TD="align: right"]4[/TD]
[TD="align: right"]7[/TD]

[TD="align: right"]1[/TD]
[TD="align: right"]5[/TD]
[TD="align: right"][/TD]
[TD="align: right"]4[/TD]
[TD="align: right"]6[/TD]
[TD="align: right"]3.5[/TD]
[TD="align: right"]9.5[/TD]

[TD="align: center"]6[/TD]
[TD="align: right"]2[/TD]
[TD="align: right"]3[/TD]
[TD="align: right"][/TD]
[TD="align: right"]5[/TD]
[TD="align: right"]7[/TD]
[TD="align: right"]6.5[/TD]
[TD="align: right"]12[/TD]

[TD="align: center"]7[/TD]
[TD="align: right"]2[/TD]
[TD="align: right"]23[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"]#N/A[/TD]
[TD="align: right"]#N/A[/TD]

[TD="align: center"]8[/TD]
[TD="align: right"]2[/TD]
[TD="align: right"]6[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]

[TD="align: center"]9[/TD]
[TD="align: right"]3[/TD]
[TD="align: right"]2[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]

[TD="align: center"]10[/TD]
[TD="align: right"]3[/TD]
[TD="align: right"]5[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]

[TD="align: center"]11[/TD]
[TD="align: right"]4[/TD]
[TD="align: right"]78[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]

[TD="align: center"]12[/TD]
[TD="align: right"]4[/TD]
[TD="align: right"]2[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]

[TD="align: center"]13[/TD]
[TD="align: right"]4[/TD]
[TD="align: right"]3[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]

[TD="align: center"]14[/TD]
[TD="align: right"]4[/TD]

[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]

[TD="align: center"]15[/TD]
[TD="align: right"]4[/TD]
[TD="align: right"]5[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]

[TD="align: center"]16[/TD]
[TD="align: right"]5[/TD]
[TD="align: right"]4[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]

[TD="align: center"]17[/TD]
[TD="align: right"]5[/TD]
[TD="align: right"]9[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]

[TD="align: center"]18[/TD]
[TD="align: right"]6[/TD]
[TD="align: right"]1[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]

[TD="align: center"]19[/TD]
[TD="align: right"]6[/TD]
[TD="align: right"]3[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]

[TD="align: center"]20[/TD]
[TD="align: right"]6[/TD]
[TD="align: right"]11[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]

[TD="align: center"]21[/TD]
[TD="align: right"]7[/TD]
[TD="align: right"]15[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]

</tbody>
Sheet3​

[TABLE="width: 85%"]
<tbody>[TR]
[TD]Worksheet Formulas[TABLE="width: 100%"]
<tbody>[TR="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=DAE7F5]#DAE7F5[/URL] "]
[TH]Cell[/TH]
[TH="align: left"]Formula[/TH]
[/TR]
[TR]
[TH="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=DAE7F5]#DAE7F5[/URL] "]E2[/TH]
[TD="align: left"]=D2+2[/TD]
[/TR]
[TR]
[TH="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=DAE7F5]#DAE7F5[/URL] "]F2[/TH]
[TD="align: left"]=MEDIAN(INDEX(B:B,MATCH(D2,A:A,0)):INDEX(B:B,LOOKUP(2,1/(A$2:A$21=E2),ROW(A$2:A$21))))[/TD]
[/TR]
[TR]
[TH="bgcolor: [URL=https://www.mrexcel.com/forum/usertag.php?do=list&action=hash&hash=DAE7F5]#DAE7F5[/URL] "]G2[/TH]
[TD="align: left"]=PERCENTILE.EXC(INDEX(B:B,MATCH(D2,A:A,0)):INDEX(B:B,LOOKUP(2,1/(A$2:A$21=E2),ROW(A$2:A$21))),0.75)[/TD]
[/TR]
</tbody>[/TABLE]
[/TD]
[/TR]
</tbody>[/TABLE]
 
Upvote 0
Amazing Eric. Thanks for the help. It worked quite well. I am going to try to understand the logic you have used in the formula though.
 
Upvote 0
Glad to help! :cool:

To help you out, this part of the formula:

MATCH(D2,A:A,0)

finds the first instance of D2 in column A, and this part:

LOOKUP(2,1/(A$2:A$21=E2),ROW(A$2:A$21))

finds the last instance of E2 in A2:A21.
 
Upvote 0
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