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Top Forums Shell Programming and Scripting Use sort to sort numerical column Post 303035328 by sand1234 on Tuesday 21st of May 2019 08:38:43 AM
Old 05-21-2019
reviewing solutions

reviewing solutions

--- Post updated at 12:38 PM ---

Hi,

1st solution works:

Code:
$ sed 's/^ *//' bfd.txt | sort -bV

BE31.116              0s               0s               DOWN DAMP
BE31.116               0s               0s               DOWN DAMP
BE31.117              0s               0s               DOWN DAMP
BE31.702                 0s               0s               DOWN DAMP
BE31.961              0s               0s               DOWN DAMP
BE31.3918           0s               0s               DOWN DAMP
BE62.2040               0s               0s               DOWN DAMP

2nd solution fails:

Code:
$ sed 's/^ *//' bfd.txt | sort -k1.3,1n

BE31.116              0s               0s               DOWN DAMP
BE31.116              0s               0s               DOWN DAMP
BE31.117               0s               0s               DOWN DAMP
BE31.3918             0s               0s               DOWN DAMP  <----- incorrect
BE31.702                 0s               0s               DOWN DAMP
BE31.961            0s               0s               DOWN DAMP
BE62.2040               0s               0s               DOWN DAMP

Can you please shed some light on why the 2nd solution does not work?
Also, why do we need 1n after -k1,3? I get the same result with and without this switch.

Thanks,

Last edited by Scrutinizer; 05-21-2019 at 11:52 AM..
 

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ascii(5)							File Formats Manual							  ascii(5)

NAME
ascii - Octal, hexadecimal, and decimal ASCII character sets DESCRIPTION
The octal character set is: 000 nul 020 dle 040 sp 060 0 100 @ 120 P 140 ` 160 p 001 soh 021 dc1 041 ! 061 1 101 A 121 Q 141 a 161 q 002 stx 022 dc2 042 " 062 2 102 B 122 R 142 b 162 r 003 etx 023 dc3 043 # 063 3 103 C 123 S 143 c 163 s 004 eot 024 dc4 044 $ 064 4 104 D 124 T 144 d 164 t 005 enq 025 nak 045 % 065 5 105 E 125 U 145 e 165 u 006 ack 026 syn 046 & 066 6 106 F 126 V 146 f 166 v 007 bel 027 etb 047 ' 067 7 107 G 127 W 147 g 167 w 010 bs 030 can 050 ( 070 8 110 H 130 X 150 h 170 x 011 ht 031 em 051 ) 071 9 111 I 131 Y 151 i 171 y 012 nl 032 sub 052 * 072 : 112 J 132 Z 152 j 172 z 013 vt 033 esc 053 + 073 ; 113 K 133 [ 153 k 173 { 014 np 034 fs 054 , 074 < 114 L 134 154 l 174 | 015 cr 035 gs 055 - 075 = 115 M 135 ] 155 m 175 } 016 so 036 rs 056 . 076 > 116 N 136 ^ 156 n 176 ~ 017 si 037 us 057 / 077 ? 117 O 137 _ 157 o 177 del The hexadecimal character set is: 00 nul 10 dle 20 sp 30 0 40 @ 50 P 60 ` 70 p 01 soh 11 dc1 21 ! 31 1 41 A 51 Q 61 a 71 q 02 stx 12 dc2 22 " 32 2 42 B 52 R 62 b 72 r 03 etx 13 dc3 23 # 33 3 43 C 53 S 63 c 73 s 04 eot 14 dc4 24 $ 34 4 44 D 54 T 64 d 74 t 05 enq 15 nak 25 % 35 5 45 E 55 U 65 e 75 u 06 ack 16 syn 26 & 36 6 46 F 56 V 66 f 76 v 07 bel 17 etb 27 ' 37 7 47 G 57 W 67 g 77 w 08 bs 18 can 28 ( 38 8 48 H 58 X 68 h 78 x 09 ht 19 em 29 ) 39 9 49 I 59 Y 69 i 79 y 0a nl 1a sub 2a * 3a : 4a J 5a Z 6a j 7a z 0b vt 1b esc 2b + 3b ; 4b K 5b [ 6b k 7b { 0c np 1c fs 2c , 3c < 4c L 5c 6c l 7c | 0d cr 1d gs 2d - 3d = 4d M 5d ] 6d m 7d } 0e so 1e rs 2e . 3e > 4e N 5e ^ 6e n 7e ~ 0f si 1f us 2f / 3f ? 4f O 5f _ 6f o 7f del The decimal character set is: 0 nul 16 dle 32 sp 48 0 64 @ 80 P 96 ` 112 p 1 soh 17 dc1 33 ! 49 1 65 A 81 Q 97 a 113 q 2 stx 18 dc2 34 " 50 2 66 B 82 R 98 b 114 r 3 etx 19 dc3 35 # 51 3 67 C 83 S 99 c 115 s 4 eot 20 dc4 36 $ 52 4 68 D 84 T 100 d 116 t 5 enq 21 nak 37 % 53 5 69 E 85 U 101 e 117 u 6 ack 22 syn 38 & 54 6 70 F 86 V 102 f 118 v 7 bel 23 etb 39 ' 55 7 71 G 87 W 103 g 119 w 8 bs 24 can 40 ( 56 8 72 H 88 X 104 h 120 x 9 ht 25 em 41 ) 57 9 73 I 89 Y 105 i 121 y 10 nl 26 sub 42 * 58 : 74 J 90 Z 106 j 122 z 11 vt 27 esc 43 + 59 ; 75 K 91 [ 107 k 123 { 12 np 28 fs 44 , 60 < 76 L 92 108 l 124 | 13 cr 29 gs 45 - 61 = 77 M 93 ] 109 m 125 } 14 so 30 rs 46 . 62 > 78 N 94 ^ 110 n 126 ~ 15 si 31 us 47 / 63 ? 79 O 95 _ 111 o 127 del ascii(5)
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