01-10-2013
Thanks a lot...it worked
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I'm using the join command and it appears to discard certain fields. Here are the two files i'm comparing:
File1:
1 a
2 b
3 c
4 d
99 f
101 g
999 i
200 j
File 2:
1 e
2 f
3 g
4 h
99 h (22 Replies)
Discussion started by: penfold
22 Replies
2. Shell Programming and Scripting
Hi,
I am trying to use join command for two files of size greater than 1 GB.
join -t , -1 2 -2 1 -o 1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9,1.10,1.11,1.12,1.13,1.14,1.15,1.16,1.17,1.18,1.19,1.20,1.21,1.22,1.23 File1 File2 > File3
we are facing space crunch after using these join command.
May i... (0 Replies)
Discussion started by: jerome Sukumar
0 Replies
3. Shell Programming and Scripting
Hi,
I am a new learner of join command. Some result really make me confused.
Please kindly help me.
input:
file1:
LEO oracle engineer 210375
P.Jones Office Runner ID897
L.Clip Personl Chief ID982
S.Round UNIX admin ID6
file2:
Dept2C ID897 6 years
Dept5Z ID982 1 year
Dept3S ID6 2... (1 Reply)
Discussion started by: summer_cherry
1 Replies
4. Shell Programming and Scripting
Dear Experts,
I have several (say 'm') text files, each with 'n' columns. I want to put them into a large single file with n*m columns.
a 1 a 1 a 1 a 1
b 2 b 5 b 1 b 3
c 3 c 7 ... (1 Reply)
Discussion started by: Mish_99
1 Replies
5. Shell Programming and Scripting
All,
I have 3 files (tab seperated):
Note: Please treat dash (-) as empty value in the file, I have added it to make input easily readable
file1: (2 cols)
A 1
B 2
C 3
file2: (4 cols - col4 has empty values for 4th column except 2nd row)
A 1 5 -
B 2 6 Y
C 3 7 -
D 4 8 -
file3... (1 Reply)
Discussion started by: bgmmk
1 Replies
6. Shell Programming and Scripting
I am given:
Sara:Smith:11234:3:63498:25:40
Perry:Potter:12445:2:35664:15:40
Ann:Abbott:23323:2:54865:22:42
Maple:Myers:24223:1:63498:18:35
Harold:Hanson:35664:2:54865:10:40
Bob:Brown:40778:1:24223:15:40
Jane:Jones:41288:1:53498:24:40
Wanda:Wallace:51122:4:63498:55:40... (4 Replies)
Discussion started by: ehshi1992
4 Replies
7. Shell Programming and Scripting
Hello,
I am using join to merge two files together. The defaults usually works great
join file1 file2 However, sometimes file1 or file2 has more keys, which I want to keep.
file 1:
-1 z
0 a
1 b
2 c
file 2:
0 a2
1 b2
2 c2
3 c3
So I do
join -a1 -a2 file1 file2 But then you don't... (0 Replies)
Discussion started by: ayu
0 Replies
8. Shell Programming and Scripting
input1
a_a a/a 10 100
a1 a_a 20 200
b1 b_b 30 300
input2
a_a a/a xxx yyy
a1 a1 lll ppp
b1 b_b kkk ooo
output
a_a a/a 10 100 xxx yyy (2 Replies)
Discussion started by: ruby_sgp
2 Replies
9. UNIX for Dummies Questions & Answers
file1:
Toronto:12439755:1076359:July 1, 1867:6
Quebec City:7560592:1542056:July 1, 1867:5
Halifax:938134:55284:July 1, 1867:4
Fredericton:751400:72908:July 1, 1867:3
Winnipeg:1170300:647797:July 15, 1870:7
Victoria:4168123:944735:July 20, 1871:10
Charlottetown:137900:5660:July 1, 1873:2... (2 Replies)
Discussion started by: mindfreak
2 Replies
10. UNIX for Dummies Questions & Answers
Hi,
I have 20 tab delimited text files that have a common column (column 1). The files are named GSM1.txt through GSM20.txt. Each file has 3 columns (2 other columns in addition to the first common column).
I want to write a script to join the files by the first common column so that in the... (5 Replies)
Discussion started by: evelibertine
5 Replies
LEARN ABOUT X11R4
pbmreduce
pbmreduce(1) General Commands Manual pbmreduce(1)
NAME
pbmreduce - read a portable bitmap and reduce it N times
SYNOPSIS
pbmreduce [-floyd|-fs|-threshold ] [-value val] N [pbmfile]
DESCRIPTION
Reads a portable bitmap as input. Reduces it by a factor of N, and produces a portable bitmap as output.
pbmreduce duplicates a lot of the functionality of pgmtopbm; you could do something like pnmscale | pgmtopbm, but pbmreduce is a lot
faster.
pbmreduce can be used to "re-halftone" an image. Let's say you have a scanner that only produces black&white, not grayscale, and it does a
terrible job of halftoning (most b&w scanners fit this description). One way to fix the halftoning is to scan at the highest possible res-
olution, say 300 dpi, and then reduce by a factor of three or so using pbmreduce. You can even correct the brightness of an image, by
using the -value flag.
OPTIONS
By default, the halftoning after the reduction is done via boustrophedonic Floyd-Steinberg error diffusion; however, the -threshold flag
can be used to specify simple thresholding. This gives better results when reducing line drawings.
The -value flag alters the thresholding value for all quantizations. It should be a real number between 0 and 1. Above 0.5 means darker
images; below 0.5 means lighter.
All flags can be abbreviated to their shortest unique prefix.
SEE ALSO
pnmenlarge(1), pnmscale(1), pgmtopbm(1), pbm(5)
AUTHOR
Copyright (C) 1988 by Jef Poskanzer.
02 August 1989 pbmreduce(1)