Shell statistics Word Frequency script

　　

#!/bin/bashif [$#-ne 1];then        echo "usage:$0 filename";        Exit-1fifilename=$1egrep-o "\b[[:alpha:]]+\b" $filename | awk ' {count[$0]++}end{printf ("%-14s%s\n", "Word", "Count"), for (Ind in count) {printf ("%-14s%d\n", Ind,count[ind]);}} '

Two points to note here.

The difference between Egrep and grep: The EGREP supports a more complete

\b

The symbol \b
Matches the empty string at the edge of a word matches a word boundary

\< \>

The symbols \< and \> respectively match the empty string at the beginning and end of a word. Match the beginning or end of a word with an empty string

%-14s-Indicates that left-justified 14 indicates a string width of 14

Shell statistics Word Frequency script