Hi, i have a file which content the following:
>cat cols
data a:23:data
data b:76:data
data c:-30:data
i would like to sum up the value of column 2, but the result that return to me is 0. Can anyone help?
i'm using this code to do the sum
awk -F" " 'BEGIN {x=0} {x+=$2} END {print... (5 Replies)
Here is my file name countries
USSR 8650 262 Asia
Canada 3852 24 North America
China 3692 866 Asia
USA 3615 219 North America
Brazil 3286 116 South America
India 1269 637 Asia
Argentina 1072 ... (8 Replies)
Hello,
I just need to print the # of columns for each line of the input file.
The input file uses the ascii 009 tab character.
I specify this character as the FS (field separator) in the BEGIN section, and I know the FS character is correct because I can print it.
When I try to print the #... (1 Reply)
Input file
data US 100.25
data ENG 235.01
data US 23.12
data ENG 23.01
END UK 230.50
END Russia 20.00
.
.
Desired output
data US 123.37
data ENG 258.02
END UK 230.50
END Russia 20.00
.
. (1 Reply)
Input file
11916 30640 9320 51876
5690 15874 4723 26287
5121 12269 2569 19959
9 71 6 86
Desired output file
11916 30640 9320 51876
5690 15874 4723 26287
5121 12269 2569 19959
9 71 6 86
22736 58854 16618 98208
Last part is the total up of first three data.
I used the following... (6 Replies)
Hi I have this file which contains
Al,AADESH,id1_0,23,2013-01-28,2,2
Al,AADESH,id1_0,23,2013-01-29,4,4
Al,AADESH,id1_0,23,2013-01-30,2,1
Al,AADESH,id1_0,31,2013-01-29,1,1
Al,AESH,id1_0,31,2013-01-31,2,2
Al,AESH,id2_2,23,2013-01-29,1,1
Al,AESH,id2_2,31,2013-01-31,1,1 ... (5 Replies)
Hi
i need to calculate the total of a column from a file in ksh
vi file.txt
System : CBSE ent=0.1 me=Cap
Subject Maths Science
xxxxx 56 98
yyyy 89 67
ooo 67 32
Here i need to calculate only the total of Maths column alone i.e., 56+89+67
... (4 Replies)
How to find total number of special character in a column?
I am using awk -f "," '$col_number "*$" {print $col_number}' file.csv|wc -l but its not giving correct output. It's giving output as 1 even though i give no special character?
Please use code tags next time for your code and... (4 Replies)
bup-margin(1) General Commands Manual bup-margin(1)NAME
bup-margin - figure out your deduplication safety margin
SYNOPSIS
bup margin [options...]
DESCRIPTION
bup margin iterates through all objects in your bup repository, calculating the largest number of prefix bits shared between any two
entries. This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids.
For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45. That means a 46-bit
hash would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by
its first 46 bits.
The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects. Since SHA-1 hashes have 160 bits,
that leaves 115 bits of margin. Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits
with far fewer objects.
If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see if
you're getting dangerously close to 160 bits.
OPTIONS --predict
Guess the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer
from the guess. This is potentially useful for tuning an interpolation search algorithm.
--ignore-midx
don't use .midx files, use only .idx files. This is only really useful when used with --predict.
EXAMPLE
$ bup margin
Reading indexes: 100.00% (1612581/1612581), done.
40
40 matching prefix bits
1.94 bits per doubling
120 bits (61.86 doublings) remaining
4.19338e+18 times larger is possible
Everyone on earth could have 625878182 data sets
like yours, all in one repository, and we would
expect 1 object collision.
$ bup margin --predict
PackIdxList: using 1 index.
Reading indexes: 100.00% (1612581/1612581), done.
915 of 1612581 (0.057%)
SEE ALSO bup-midx(1), bup-save(1)BUP
Part of the bup(1) suite.
AUTHORS
Avery Pennarun <apenwarr@gmail.com>.
Bup unknown-bup-margin(1)