Averages/Median: Difference between revisions
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=={{header|J}}==
The verb <code>median</code> is available from the <code>stats/base</code> addon and returns the mean of the two middle values for an even number of elements:
<lang j>
require 'stats/base'
median 1 9 2 4
3
</lang>
The definition given in the addon script is:
<lang j>
median=: -:@(+/)@((<. , >.)@midpt { /:~)
</lang>
If, for an even number of elements, both values were desired when those two values are distinct, then the following implementation would suffice:
<lang j>
median=:
median 1 9 2 4
2 4
</lang>
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