如何用AWK合并两个文件？ [英] How to merge two files using AWK?

问题描述

文件1有5个领域A B C D E等，具有字段的是一个整数值

2的文件有3个领域的一个F G

行中的文件1的数量比文件2（20 ^ 6至5000）

的更大

所有的文件1 A的条目出现在领域的文件中2

我喜欢领域的两个文件合并并进行F和G

所需的输出是A B C D E F G

示例

文件1

  A B C D E
4050 S00001 31228 3286 0
4050 S00012 31227 4251 0
4049 S00001 28342 3021 1
4048 S00001 46578 4210 0
4048 S00113 31221 4250 0
4047 S00122 31225 4249 0
4046 S00344 31322 4000 1
 

文件2

  A F G
4050 12.1 23.6
4049 14.4 47.8
4048 23.2 43.9
4047 45.5 21.6
 

所需的输出

  A B C D E F G
4050 S00001 31228 3286 0 12.1 23.6
4050 S00012 31227 4251 0 12.1 23.6
4049 S00001 28342 3021 1 14.4 47.8
4048 S00001 46578 4210 0 23.2 43.9
4048 S00113 31221 4250 0 23.2 43.9
4047 S00122 31225 4249 0 45.5 21.6
 

解决方案

  $ AWK'FNR == NR {A [$ 1] = $ 16 FS $ 3;接下来} {打印$ 0时， [$ 1]}'文件2文件1
4050 S00001 31228 3286 0 12.1 23.6
4050 S00012 31227 4251 0 12.1 23.6
4049 S00001 28342 3021 1 14.4 47.8
4048 S00001 46578 4210 0 23.2 43.9
4048 S00113 31221 4250 0 23.2 43.9
4047 S00122 31225 4249 0 45.5 21.6
4046 S00344 31322 4000 1
 

File 1 has 5 fields A B C D E, with field A is an integer-valued

File 2 has 3 fields A F G

The number of rows in File 1 is much bigger than that of File 2 (20^6 to 5000)

All the entries of A in File 1 appeared in field A in File 2

I like to merge the two files by field A and carry F and G

Desired output is A B C D E F G

Example

File 1

 A     B     C    D    E
4050 S00001 31228 3286 0
4050 S00012 31227 4251 0
4049 S00001 28342 3021 1
4048 S00001 46578 4210 0
4048 S00113 31221 4250 0
4047 S00122 31225 4249 0
4046 S00344 31322 4000 1

File 2

A     F    G   
4050 12.1 23.6
4049 14.4 47.8   
4048 23.2 43.9
4047 45.5 21.6

Desired output

A    B      C      D   E F    G
4050 S00001 31228 3286 0 12.1 23.6
4050 S00012 31227 4251 0 12.1 23.6
4049 S00001 28342 3021 1 14.4 47.8
4048 S00001 46578 4210 0 23.2 43.9
4048 S00113 31221 4250 0 23.2 43.9
4047 S00122 31225 4249 0 45.5 21.6

解决方案

$ awk 'FNR==NR{a[$1]=$2 FS $3;next}{ print $0, a[$1]}' file2 file1
4050 S00001 31228 3286 0 12.1 23.6
4050 S00012 31227 4251 0 12.1 23.6
4049 S00001 28342 3021 1 14.4 47.8
4048 S00001 46578 4210 0 23.2 43.9
4048 S00113 31221 4250 0 23.2 43.9
4047 S00122 31225 4249 0 45.5 21.6
4046 S00344 31322 4000 1

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