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Diffstat (limited to 'README')
| -rw-r--r-- | README | 21 |
1 files changed, 15 insertions, 6 deletions
@@ -2,13 +2,25 @@ NAME median - Calculate the median values for a set of groups SYNOPSIS - median < INPUT + median DESCRIPTION median takes the first blank space-separated column values and the remainder as keys. It will then print the median for - each key. As a side effect median will print the result - sorted by the keys. + each key. Lines with the same key form a group. + + median outputs the median value for each key, no order of + the output lines are prescribed. No order is prescribed for + the input lines. + + Lines without a blank space are parsed as having the empty + string as the key, for lines with a blank space, the first + blank space is parsed as part of the key. + + For groups with an even number of elements, if the mean of + the middle two values are used as the median if all values + in the group are numerical, otherwise the lower value is + used as the median. EXAMPLES $ cat <<EOF | median @@ -38,6 +50,3 @@ RATIONALE SEE ALSO sort(1), expr(1), sets(1) - - Full documentation available locally via: info '(median)' - |