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From: Mark Bourne <nntp.mbourne@spamgourmet.com>
Newsgroups: comp.lang.c
Subject: Re: Baby X is bor nagain
Date: Tue, 18 Jun 2024 20:52:58 +0100
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DFS wrote:
> On 6/18/2024 12:11 PM, David Brown wrote:
> 
> 
>> if n % 2 == 1 :
>>          median = sorted(data)[n // 2]
>> else :
>>          median = sum(sorted(data)[(n // 2 - 1) : (n // 2 + 1)]) / 2
> 
> I think your else formula (n % 2 == 0) is incorrect:
> 
> n      = 4
> data   = [1,2,3,4]
> median = 2.5
> 
> Yours appears to sum (1,2,3) = 6 / 2 = 3.
> 
> Am I reading it correctly?

Python ranges include the start index but exclude the end index.  So 
data[1:3] gives the items at data[1] and data[2], but not data[3]. 
Indexes are zero-based, so data[1:3] == [2, 3], sum([2, 3]) == 5, and 5 
/ 2 == 2.5.

-- 
Mark.