日志文本筛选-sort awk

求最大值：

awk 'BEGIN {max = 0} {if ($1+0 > max+0) max=$1} END {print "Max=", max}' test.txt

求最小值：

awk 'BEGIN {min = 65536} {if ($1+0 < min+0) min=$1} END {print "Min=", min}' test.txt

求和：

cat test.txt|awk '{sum+=$1} END {print "Sum= ", sum}'

求平均值：

cat test.txt|awk '{sum+=$1} END {print "Avg= ", sum/NR}'

求最大值

cat test.txt|awk 'BEGIN {max = 0} {if ($1>max) max=$1 fi} END {print "Max=", max}

求最大值

cat test.txt|awk 'BEGIN {max = 0} {if ($1+0>max+0) max=$1 fi} END {print "Max=", max}'

求最小值

cat test.txt|awk 'BEGIN{min = 65536}{if ($1+0<min+0) min=$1 fi}END{print "Min=", min}'

中位数

#/usr/bin/env awk
{
  count[NR] = $1;
}
END {
    if (NR % 2) {
        print count[(NR + 1) / 2];
    } else {
        print (count[(NR / 2)] + count[(NR / 2) + 1]) / 2.0;
    }
}