linux - 词频和-gt

Question

我的代码检查文件中所有单词的频率并显示，但我想知道如何只显示长度大于变量 k 的单词。 这是我的代码:

#!/bin/bash
if [ $# -eq 0 ]; then

    echo "you need an argument"
    exit 2
fi

echo "Insert k"
read k
for file in $@; do
    if ! [ -f $file ]; then
    echo "Not a file"
    exit 2
    fi
    sed -e 's/\s/\n/g' < $file | sort | uniq -c | sort -nr
done

文件内容:

ceva
ceva
aiurea
sebi
este
cel
mai
smecher

输出:

     2 ceva
     1 smecher
     1 sebi
     1 mai
     1 este
     1 cel
     1 aiurea

Answer 1

使用 awk 计算字长大于变量的频率:

awk -v k=3 'length() > k { freq[$0]++} END{for (i in freq) print freq[i], i}' file |
sort -rn

2 ceva
1 smecher
1 sebi
1 este
1 aiurea

完整脚本:

#!/usr/bin/env bash
if [[ $# -eq 0 ]]; then
    echo "you need an argument"
    exit 2
fi

read -p "Insert k: " k

for file in "$@"; do
    if [[ ! -f $file ]]; then
       echo "$file is not a file"
       exit 2
    fi

    echo "$file:"
    awk -v k=$k 'length()>k{freq[$0]++} END{for (i in freq) print freq[i], i}' "$file" | sort -rn
done