转（linux shell)(2)

http://oldboy.blog.51cto.com/2561410/1665163

1、按单词出现频率降序排序！

2、按字母出现频率降序排序！

the squid project provides a number of resources to assist users design,implement and support squid installations. Please browse the documentation and support sections for more infomation

解答：

cat test.txt

the squid project provides a number of resources to assist users design,implement and support squid installations. Please browse the documentation and support sections for more infomation

按单词排序解答：

法1：

[root@oldboy ~]

# awk -F "[,. ]" '{for(i=1;i<=NF;i++)array[$i]++}END{for(key in array)print array[key],key|"sort -nr"}' oldboy.txt|column -t

2 the

2 support

2 squid

2 and

1 users

1 to

1 sections

1 resources

1 provides

1 project

1 Please

1 of

1 number

1 more

1 installations

1 infomation

1 implement

1 for

1 documentation

1 design

1 browse

1 assist

1 a

1

法2：

[root@MySQL ~]# tr "[ ,.]" "\n"<oldboy.txt|grep -v "^$"|sort|uniq -c|sort -rn

2 the

2 support

2 squid

2 and

1 users

1 to

1 sections

1 resources

1 provides

1 project

1 Please

1 of

1 number

1 more

1 installations

1 infomation

1 implement

1 for

1 documentation

1 design

1 browse

1 assist

1 a

按字母频率排序

法1

[root@MySQL ~]

# tr "{ |,|.}" "\n"<oldboy.txt|awk -F ""  '{for(i=1;i<=NF;i++)array[$i]++}END{for(key in array)print array[key],key|"sort -nr"}'

19 s

17 e

16 o

14 t

12 n

12 i

11 r

9 a

8 u

7 p

7 d

6 m

4 l

4 c

3 f

2 q

2 h

2 b

1 w

1 v

1 P

1 j

1 g

[root@MySQL ~]

# tr "[ ,.]" "\n"<oldboy.txt|awk '{for(i=1; i<=length($0); i++) ++S[substr($0,i,1)]} END {for(a in S) print S[a], a|"sort -rn"}'

19 s

17 e

16 o

14 t

12 n

12 i

11 r

9 a

8 u

7 p

7 d

6 m

4 l

4 c

3 f

2 q

2 h

2 b

1 w

1 v

1 P

1 j

1 g

[root@db02 oldboy20151227]

# echo "the squid project provides a number of resources toassist users design,implement and support squid installations. Please browsethe documentation and support sections for more infomation"|sed 's# ##g'|sed -r 's#(.)#\1\n#g'|sort|uniq -c|sort -rn -k1

19 s

17 e

16 o

14 t

12 n

12 i

11 r

9 a

8 u

7 p

7 d

6 m

4 l

4 c

3 f

2 q

2 h

2 b

1 w

1 v

1 j

1 g

1 P

1 .

1 ,

1

[root@db02 oldboy20151227]

# echo "the squid project provides a number of resources toassist users design,implement and support squid installations. Please browsethe documentation and support sections for more infomation"|sed 's# ##g'|awk -F "" '{for(n=1;n<=NF;n++) print $n}'|sort|uniq -c|sort -k1 -nr

19 s

17 e

16 o

14 t

12 n

12 i

11 r

9 a

8 u

7 p

7 d

6 m

4 l

4 c

3 f

2 q

2 h

2 b

1 w

1 v

1 j

1 g

1 P

1 .

1 ,

巴特西

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