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#!/usr/bin/env awk -f
#
# @license Apache-2.0
#
# Copyright (c) 2017 The Stdlib Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Computes the median.
#
# Usage: median
#
# Input:
# - a sorted column of numbers
#
# Output:
# - median value
BEGIN {
i = 0
}
{
a[i++] = $1
}
END {
j = i/2
if (i%2 == 1) {
median = a[int(j)]
} else {
median = (a[j] + a[j-1])/2
}
print median
}
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