10-26-2012
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have a file file like this. I want to sum all column 1 values.
input
A 2
A 3
A 4
B 4
B 2
Out put
A 9
B 6 (3 Replies)
Discussion started by: suresh3566
3 Replies
2. Shell Programming and Scripting
Hi
I am trying to add count values from two different files into one file. Could any body please suggest me best command to do this? My problem was as follows:
a.txt b.txt c.txt
10 20 30(needed)
i tried cat a.txt b.txt > c.txt (its not adding the values)
Thanks in advance..
Praveen (8 Replies)
Discussion started by: npk2210
8 Replies
3. Shell Programming and Scripting
Dear Guyz:)
I have 2 different input files like this. I would like to pick the values or letters from the inputfile2 based on inputfile1 keys (A,F,N,X,Z).
I have done similar task by using awk but in that case the inputfiles are similar like in inputfile2 (all keys in 1st column and values in... (16 Replies)
Discussion started by: repinementer
16 Replies
4. Shell Programming and Scripting
Hi.
Im looking for way to sum numbers from top. For example i have such command
top -b -n | grep Cpu | cut -c 35 - 39
which give me output 97.0 . Ho can i do with that value any arithmetic actions (for example 97.0 +1)?
Using
c = $((top -b -n | grep Cpu | cut -c 35 - 39))
gives me... (8 Replies)
Discussion started by: qdf
8 Replies
5. Shell Programming and Scripting
Hi All,
I have a file which is having 3 columns as (string string integer)
a b 1
x y 2
p k 5
y y 4
.....
.....
Question:
I want get the unique value of column 2 in a sorted way(on column 2) and the sum of the 3rd column of the corresponding rows. e.g the above file should return the... (6 Replies)
Discussion started by: amigarus
6 Replies
6. Shell Programming and Scripting
I am running the following script :
cat ind_sls_extr_UX.out_sorted | while read each_rec
do
count=`echo "${each_rec}" | cut -c1-2`
if
then
final_amount=0
amount=`echo "${each_rec}" | cut -c280-287`
echo "${amount}"
final_amount=`expr ${amount} + ${amount}`
... (7 Replies)
Discussion started by: mady135
7 Replies
7. Shell Programming and Scripting
I have a file in the following layout:
201008005946873001846130058030701006131840000000000000000000
201008006784994001154259058033001009527844000000000000000000
201008007323067002418095058034801002418095000000000000000000
201008007697126001722141058029101002214158000000000000000000... (2 Replies)
Discussion started by: jclanc8
2 Replies
8. UNIX for Dummies Questions & Answers
I have a file with data merged from multiple files. File contains header, data and trailer of multiple files. The trailer starts with 99 and delimiter is ~.
Trailer
99~120
99~30
As it is a merged file we i have multiple lines followed by 99~. Need help to find sum of values which are there... (4 Replies)
Discussion started by: santoshdrkr
4 Replies
9. Shell Programming and Scripting
Hi,
I have a table to be imported for R as matrix or data.frame but I first need to edit it because I've got several lines with the same identifier (1st column), so I want to sum the each column (2nd -nth) of each identifier (1st column)
The input is for example, after sorted:
K00001 1 1 4 3... (8 Replies)
Discussion started by: sargotrons
8 Replies
10. Shell Programming and Scripting
Hi Gurus,
I have requirement need to sum the value, the logic is if the value is negative then time -1, I tried below two ways. one is failed, another one doesn't work.
awk -F"," '{if($8< 0 $8*-1 else $8) sum+=$8}{print sum, $8} END{printf("%.2f\n",sum)}'
awk -F","... (4 Replies)
Discussion started by: ken6503
4 Replies
LEARN ABOUT DEBIAN
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)