好的，你问过它 - 这是我尝试使用的完整代码。
我需要的帮助是： postprocauto.sh：一个以可读格式呈现数据的脚本。
我应该带一个autocsv文件的猫（下面的示例 - 完整文件是160k），然后通过各种其他脚本管道，所以最后，你将有这个命令行：
cat autocsv | ./ prepprocauto.sh | ./BMW.sh | ./6cyl.sh | ./hwyfe.sh | ./postprocauto.sh
我的问题是除了postprocauto.ch之外我可以运行所有东西。我需要能够做到这一点：
Requirements for this script:
It must print header information after 20 lines of data.
The breaks must have a least one empty line between them
before printing another header.
The last line of the output should print out the number of
records that were processed.
输出的一个例子：
Year Eng. Disp. Cyl. City FE Hwy FE Model
2013 1.5 4 39 38 ILX
2013 2 4 24 35 ILX
2013 2.4 4 22 31 ILX
2013 2.4 4 22 31 TSX
2013 2.4 4 21 29 TSX
2013 3.5 6 19 28 TSX
2013 1.3 4 41 44 INSIGHT
2013 1.3 4 41 44 INSIGHT
2013 3.5 6 20 29 TL 2WD
2013 3.7 6 18 26 TL 4WD
2013 3.7 6 17 25 TL 4WD
There were 11 records processed.
下面是不同的脚本 - 如果你想要全尺寸autocsv，告诉我把它放到哪里 - 520k文件大小
prepprocauto.sh
#!/bin/bash
while read x
do
echo $x | awk -F',' ' { print $1":"$2":"$4":"$7":"$8":"$10":"$11":"$12":"$22":"$24}'
done
BMW.sh
#!/bin/bash
selection='BMW'
if [ ! $# -lt 1 ]; then
selection=$1
fi
while read y; do
model=$(echo $y | awk -F':' '{print $2 }')
if [ "$model" == "$selection" ]; then
echo $y
fi
done
6cyl.sh
#!/bin/bash
selection='6'
if [ ! $# -lt 1 ]; then
selection=$1
fi
while read y; do
model=$(echo $y | awk -F':' '{print $5 }')
if [ "$model" == "$selection" ]; then
echo $y
fi
done
hwyfe.sh
#!/bin/bash
selection='31'
if [ ! $# -lt 1 ]; then
selection=$1
fi
while read y; do
hwy=$(echo $y | awk -F':' '{print $7 }')
if [ "$hwy" -gt "$selection" ]; then
echo $y
fi
done
postprocauto.sh
output=$(awk -F ':' '{print $1 "\t" $4 "\t"$5"\t" $6 "\t" $7 "\t" $3}')
echo "Year Eng. Disp Cyl City FE Hwy FE Model"
echo "$output"
autocsv文件的内容（减少很多）
2013,Audi,Audi,TT Roadster quattro,ADX,67,2,4,Auto(AM-S6),22,31,26,28.4068,42.25
79,33.3217,22.407,31.1674,25.6515,,TC,Turbocharged,AMS,Automated Manual- Selecta
ble (e.g. Automated Manual with paddles),6,Y,N,A,10,GP,Gasoline (Premium Unleade
d Recommended),MPG,N,,,,,,,2200,2200,2,2,1,Two Seaters,car,Vehicle Specific 5-cy
cle label,6/18/12,12113,,N,N,,,N,N,ENGINE CODE CDMA ONLY.,N,,Y,CONTINUOUS VARIAB
LE VALVE TIMING,N,,,,,,,,,,,,,,,,,,,,,,,,,,,GDI,Spark Ignition Direct Injection,
N,N,5W40,33.3,7,7,,DADXV02.03UA,5,600,
2013,BMW,BMW,Z4 sDrive28i,BMX,428,2,4,Auto(A8),22,33,26,27.9499,46.8923,34.1594,
21.9803,33.2305,25.9308,,TC,Turbocharged,A,Automatic,8,Y,N,R,10,GP,Gasoline (Pre
mium Unleaded Recommended),MPG,N,,,,,,,2200,2200,2,2,1,Two Seaters,car,Derived 5
-cycle label,7/24/12,11033,,N,N,,,N,N,,N,,Y,variable valve timing at inlet and o
utlet valves,Y,variable valve lift at inlet valves,,,,,,,,,,,,,,,,,,,,,,,,,,GDI,
Spark Ignition Direct Injection,,Y,0W30,34.3,7,7,,DBMXJ02.0N20,5,600,
2013,BMW,BMW,Z4 sDrive28i,BMX,429,2,4,Manual(M6),22,34,26,28.3664,48.0364,34.774
1,22.2841,34.0033,26.3746,,TC,Turbocharged,M,Manual,6,N,N,R,10,GP,Gasoline (Prem
ium Unleaded Recommended),MPG,N,,,,,,,2200,2200,2,2,1,Two Seaters,car,Derived 5-
cycle label,7/25/12,11092,,N,N,,,N,N,,N,,Y,variable valve timing at inlet and ou
tlet valves,Y,variable valve lift at inlet valves,,,,,,,,,,,,,,,,,,,,,,,,,,GDI,S
park Ignition Direct Injection,,Y,0W30,34.9,7,7,,DBMXJ02.0N20,5,600,
2013,BMW,BMW,Z4 sDrive35i,BMX,436,3,6,Auto(AM-S7),17,24,19,21.1097,32.8224,25.14
8,16.8973,23.5833,19.3682,,TC,Turbocharged,AMS,Automated Manual- Selectable (e.g
. Automated Manual with paddles),7,N,N,R,10,GP,Gasoline (Premium Unleaded Recomm
ended),MPG,N,,,,,,,3000,3000,2,2,1,Two Seaters,car,Derived 5-cycle label,8/7/12,
12492,,N,N,,,N,N,,N,,Y,variable valve timing at inlet and outlet valves,N,,,,,,,
,,,,,,,,,,,,,,,,,,,,GDI,Spark Ignition Direct Injection,,Y,0W30,25.3,4,4,,DBMXV0
3.054R,5,,3400
2013,BMW,BMW,Z4 sDrive35i,BMX,435,3,6,Manual(M6),19,26,21,23.3,36.6,27.855,18.54
45,26.1997,21.352,,TC,Turbocharged,M,Manual,6,N,N,R,10,GP,Gasoline (Premium Unle
aded Recommended),MPG,N,,,,,,,2700,2700,2,2,1,Two Seaters,car,Derived 5-cycle la
bel,8/7/12,11743,,N,N,,,N,N,,N,,Y,variable valve timing at inlet and outlet valv
es,N,,,,,,,,,,,,,,,,,,,,,,,,,,,GDI,Spark Ignition Direct Injection,,Y,0W30,28.1,
5,5,,DBMXV03.054R,5,,1900
答案 0 :(得分：1)
引用$output
echo "$output"
此外，您可能希望摆脱cat的多余使用并执行
awk -F ':' '{print $1 "\t" $4 "\t"$5"\t" $6 "\t" $7 "\t" $3}' ./temp.log
而不是
答案 1 :(得分：1)
尝试使用列-t
echo $output | column -t
答案 2 :(得分：1)
您可以使用模数函数每隔第n行显示一个标题，如下所示：
$ seq 1 12 > moo
$ awk < moo 'NR%4==0 { print "\nheading\n" } {print}
END{ print "total lines: " NR}'
1
2
3
heading
4
5
6
7
heading
8
9
10
11
heading
12
total lines: 12