在Linux中用AWk编程：统计词频 统计考试成绩，假设学生成绩清单如下 编写shell脚本实现统计一个小组的成绩情况,统计信息包括:...
\u5728Linux\u4e2d\u7528AWK\u7f16\u7a0b\uff1a\u7edf\u8ba1\u8bcd\u9891 \u7edf\u8ba1\u8003\u8bd5\u6210\u7ee9\uff0c\u5047\u8bbe\u5b66\u751f\u6210\u7ee9\u6e05\u5355\u5982\u4e0b\uff1ay:root:/tmp/ss> cat xx44.datjasper: 80 82 84 84 88 92 andrea: 85 89 90 90 94 95 oellis: 89 90 92 96 96 98mona: 70 70 77 83 85 89john: 78 85 88 91 92 94dunce: 60 60 61 62 64 80y:root:/tmp/ss> ./xx44Total 6 Average 83jasper: 80 82 84 84 88 92 average 85(B)andrea: 85 89 90 90 94 95 average 90.5(A)oellis: 89 90 92 96 96 98 average 93.5(A)mona: 70 70 77 83 85 89 average 79(C)john: 78 85 88 91 92 94 average 88(B)dunce: 60 60 61 62 64 80 average 64.5(D)high: 4 low: 2A - 2B - 2C - 1D - 1y:root:/tmp/ss> cat xx44#!/bin/bashawk 'BEGIN{ sum=0}function getmark(s){ if(s=60 && s=70 && s=80 && s=90) mark="A" return mark}{ name[NR]=$1 subtotal[$1]=0 for(i=2;i= allav) hicount++ else locount++ markcnt[getmark(average[name[key]])]++ } printf("\n"); printf("\nhigh: %s low: %s\n", hicount, locount) for(key in markcnt) printf("%s - %s\n", key, markcnt[key])}' xx44.dat
#!/bin/bash
# 2013/07/01 sun
#\u529f\u80fd\u8bf4\u660e\uff1a\u5b9e\u73b0\u7edf\u8ba1\u5f55\u5165\u5b66\u751f\u6210\u7ee9\u7684\u603b\u4eba\u6570\uff0c\u5f97\u51fa\u6700\u9ad8\u5206\uff0c\u6700\u4f4e\u5206\uff0c\u5e73\u5747\u5206\uff0c\u65b9\u5dee\uff0c\u6807\u51c6\u65b9\u5dee\uff0c\u8fd8\u6709\u5404\u4e2a\u5206\u6570\u6bb5\u7684\u6240\u5360\u767e\u5206\u6bd4
echo "\u8bf7\u8f93\u5165\u6240\u6709\u5b66\u751f\u7684\u6210\u7ee9\uff0c\u4ee5\u7a7a\u683c\u9694\u5f00:"
read -a score_arr
#\u5b9a\u4e49\u4e00\u4e2a\u6570\u7ec4\u6765\u5b58\u653e\u7528\u6237\u8f93\u5165\u7684\u6210\u7ee9
sorted_arr=($(printf '%s\n' "${score_arr[@]}"|sort -n -r))
#\u5f55\u5165\u5b66\u751f\u6210\u7ee9\uff0c\u5e76\u4e14\u662f\u6210\u7ee9\u4e4b\u95f4\u4f7f\u7528\u7a7a\u683c\u9694\u5f00
declare -i i b=0 c=0 d=0 e=0 f=0
#\u5b9a\u4e49\u53d8\u91cfi\u6765\u5faa\u73af\u6570\u7ec4\uff0c\u4f9d\u6b21\u8bfb\u51fa\u6570\u7ec4\u91cc\u9762\u7684\u6570\u636e\uff0c\u5b9a\u4e49\u4e94\u4e2a\u521d\u503c\u4e3a0\u7684\u53d8\u91cf\u6765\u5b58\u653e\u6bcf\u4e2a\u5206\u6570\u6bb5\u7684\u4eba\u6570
for (( i=0; $i<${#sorted_arr[@]}; i=$i+1 ))
#\u8fdb\u884cfor\u5faa\u73af\uff0c\u4f9d\u6b21\u53d6\u51fa\u6570\u7ec4\u91cc\u9762\u7684\u6570\u636e
do
#\u5bf9\u6bcf\u4e2a\u53d6\u51fa\u6765\u7684\u6570\u636e\u8fdb\u884c\u5224\u65ad
case ${sorted_arr[i]} in
?|?\.*|[1-5]?|[1-5]?\.*)
#\u5982\u679c\u53d6\u51fa\u6570\u7ec4\u91cc\u9762\u7684\u6570\u636e\u572860\u5206\u4ee5\u4e0b
b=$(($b+1));;
#\u53d8\u91cfb\u81ea\u52a01\uff0c\u8fdb\u884c\u7edf\u8ba1\u6570\u636e
6?|6?\.*)
#\u5982\u679c\u53d6\u51fa\u6570\u7ec4\u91cc\u9762\u7684\u6570\u636e\u572860\u5206--69\u5206\u4e4b\u95f4
c=$(($c+1));;
#\u53d8\u91cfc\u81ea\u52a01\uff0c\u8fdb\u884c\u7edf\u8ba1\u6570\u636e
7?|7?\.*)
#\u5982\u679c\u53d6\u51fa\u6570\u7ec4\u91cc\u9762\u7684\u6570\u636e\u572870\u5206--79\u5206\u4e4b\u95f4
d=$(($d+1));;
#\u53d8\u91cfd\u81ea\u52a01\uff0c\u8fdb\u884c\u7edf\u8ba1\u6570\u636e
8?|8?\.*)
#\u5982\u679c\u53d6\u51fa\u6570\u7ec4\u91cc\u9762\u7684\u6570\u636e\u572880\u5206--89\u5206\u4e4b\u95f4
e=$(($e+1));;
#\u53d8\u91cfe\u81ea\u52a01\uff0c\u8fdb\u884c\u7edf\u8ba1\u6570\u636e
100|100\.0|9?|9?\.*)
#\u5982\u679c\u53d6\u51fa\u6570\u7ec4\u91cc\u9762\u7684\u6570\u636e\u572890\u5206--100\u5206\u4e4b\u95f4
f=$(($f+1));;
#\u53d8\u91cff\u81ea\u52a01\uff0c\u8fdb\u884c\u7edf\u8ba1\u6570\u636e
*)
score_rank[i]="Not a Score";;
esac
done
#\u5224\u65ad\u7ed3\u675f
count=$(($b+$c+$d+$e+$f))
#\u7b97\u51fa\u603b\u4eba\u6570
declare -i j max min ave countall=0 u ua=0 ual=0 uall=0 fang
#\u5b9a\u4e49\u53d8\u91cfj\uff0c\u6700\u5927\u503cmax\uff0c\u6700\u5c0f\u503cmin\uff0c\u5e73\u5747\u6570ave\uff0c\u6240\u6709\u4eba\u7684\u5206\u6570\u4e4b\u548ccountall
max=${sorted_arr[0]}
#\u83b7\u53d6\u6392\u5e8f\u540e\u7684\u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u6570\uff0c\u4e5f\u5c31\u662f\u6700\u5927\u6570
j=$((${#sorted_arr[@]}-1))
#\u5f97\u5230\u6392\u5e8f\u540e\u7684\u6570\u7ec4\u7684\u6700\u540e\u7684\u4e00\u4e2a\u5206\u6570\u7684\u4e0b\u6807
min=${sorted_arr[j]}
#\u83b7\u53d6\u6392\u5e8f\u540e\u7684\u6570\u7ec4\u7684\u6700\u540e\u4e00\u4e2a\u6570\uff0c\u4e5f\u5c31\u662f\u6700\u5c0f\u6570
for (( j=0; $j<${#sorted_arr[@]}; j=$j+1 ))
#\u8fdb\u884cfor\u5faa\u73af\uff0c\u8ba9\u5b66\u751f\u6210\u7ee9\u76f8\u52a0\uff0c\u7b97\u51fa\u5b66\u751f\u6210\u7ee9\u7684\u603b\u5206
do
countall=$countall+${sorted_arr[j]}
done
ave=$countall/$count
#\u7b97\u51fa\u5e73\u5747\u6210\u7ee9
for (( j=0; $j<${#sorted_arr[@]}; j=$j+1 ))
#\u8fdb\u884cfor\u5faa\u73af\uff0c\u8ba9\u5b66\u751f\u6210\u7ee9\u76f8\u52a0\uff0c\u7b97\u51fa\u5b66\u751f\u6210\u7ee9\u7684\u603b\u5206
do
ua=$(awk -v va=${sorted_arr[j]} -v vb=$ave 'BEGIN{printf "%2d" ,va-vb}')
#\u8ba9\u6bcf\u4e00\u4e2a\u6570\u90fd\u51cf\u53bb\u5e73\u5747\u6570\u7136\u540e\u8d4b\u503c\u4e8eua
ual=$(awk -v va=$ua -v vb=$ua 'BEGIN{printf "%2d" ,va*vb}')
#\u7b97\u5f97ua\u7684\u5e73\u65b9
uall=$(awk -v va=$uall -v vb=$ual 'BEGIN{printf "%2d" ,va+vb}')
#\u7b97\u51fa\u5b83\u4eec\u7684\u603b\u5408\uff0c\u4e5f\u5c31\u662f\u65b9\u5dee
done
u=$(awk -v va=$uall -v vb=$count 'BEGIN{printf "%2d" ,va/vb}')
#\u7b97\u51fa\u5b66\u751f\u6210\u7ee9\u7684\u5e73\u5747\u5206\uff0c\u5e76\u8d4b\u503c\u4e8eave
#\u4e0b\u9762\u662f\u8ba1\u7b97\u6bcf\u4e2a\u5206\u6570\u6bb5\u7684\u767e\u5206\u6570
countb=$(awk -v va=$b -v vb=$count 'BEGIN{printf "%2.2f%%" ,va*100/vb}')
#echo $countb
countc=$(awk -v va=$c -v vb=$count 'BEGIN{printf "%2.2f%%" ,va*100/vb}')
#echo $countc
countd=$(awk -v va=$d -v vb=$count 'BEGIN{printf "%2.2f%%" ,va*100/vb}')
#echo $countd
counte=$(awk -v va=$e -v vb=$count 'BEGIN{printf "%2.2f%%" ,va*100/vb}')
#echo $counte
countf=$(awk -v va=$f -v vb=$count 'BEGIN{printf "%2.2f%%" ,va*100/vb}')
#echo $countf
#\u8f93\u51fa\u7ed3\u679c
echo "\u603b\u4eba\u6570 \u6700\u9ad8\u5206 \u6700\u4f4e\u5206 \u5e73\u5747\u5206 \u65b9\u5dee "
echo "$count $max $min $ave $u "
echo "\u6807\u51c6\u65b9\u5dee="
echo "scale=5;sqrt($u)" | bc
#\u7b97\u51fa\u6807\u51c6\u65b9\u5dee
echo " 60\u5206\u4ee5\u4e0b 60--69 70--79 80--89 90--100"
echo "\u4eba\u6570" " $b $c $d $e $f"
echo "\u6bd4\u4f8b" "$countb $countc $countd $counte $countf"
awk '{for ( a=2;a<=(NF+1);a++ ){sum=sum+$a}}{print $1,sum/(NF-1);sum=0}' /test/student.data | sort -k2 -r | awk 'BEGIN{A[1]="A";A[2]="B";A[3]="C";A[4]="D";A[5]="E";A[6]="F"}{print A[NR]":",$0}'
（2）每个科目的平均分（从上至下平均分分别是数据中从左至右科目的）
#!/bin/bash
for (( i=2;i<=(NR+1);i++ ))
do
awk '{sum+=$'$i'}END{print sum/NR}' /test/student.data
done
(2)-1班级总平均分
awk '{for ( a=2;a<=(NF+1);a++ ){sum=sum+$a}}END{print sum/(NF-1)}' student.data
#!/bin/awk -f
BEGIN{
FS="[: ]"
#保存学生数
count=0;
great=0;
less=0;
}
{
#student_average用于保存每个学生的平均分
student_average[$1]=($2+$3+$4+$5+$6+$7)/6
}
END{
#class_average保存班平均分
for (student in student_average)
{
print student": "student_average[student]
count++;
class_average+=student_average[student]*6
}
class_average/=count;
print "class average: "class_average
for(student in student_average)
{
if(student_average[student]*6>=class_average)
great++;
else
less++;
}
print "the count of student that greater than average: "great
print "the count of student that less than average: "less
}
我没写等级相关的统计，因为你没给出每个的等级的分数线
如何运行：
把代码保存为student.awk
chmod +x student.awk
./sutdent.awk student.data
student.data是你的数据文件
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