Dear unix gurus,
I have a data file with header information about a subject and also 3 columns of n rows of data on various items he owns. The data file looks something like this:
adam peter
blah blah blah
blah blah blah
car
01 30 200
02 31 400
03 57 121
.. .. ..
.. .. ..
n y... (8 Replies)
Hi all,
I want to read some specific rows & columns in the .xls file with my script to get the data to be manipulated. Now, I can read the .xls file correctly & i can go to the specific sheet that I want but i have a problem to specify the specific rows & columns. I mean, I want to get the info... (0 Replies)
Hi Friends,
I have come across some files where some of the columns don not have data.
Key, Data1,Data2,Data3,Data4,Data5
A,5,6,,10,,
A,3,4,,3,,
B,1,,4,5,,
B,2,,3,4,,
If we see the above data on Data5 column do not have any row got filled. So remove only that column(Here Data5) and... (4 Replies)
Hi all, I know this sounds suspiciously like a homework course; but, it is not.
My goal is to take a file, and match my "ID" column to the "Date" column, if those conditions are true, add the total number of minutes worked and place it in this file, while not printing the original rows that I... (6 Replies)
Hi all, I'm pretty much a newbie to UNIX. I would appreciate any help with UNIX coding on comparing two large csv files (greater than 10 GB in size), and output a file with matching columns.
I want to compare file1 and file2 by 'id' and 'chain' columns, then extract exact matching rows'... (5 Replies)
Hi, I am trying to selectively merge two files based on keys reported in the 1st column.
File1:
#file1-header1
file1-header2
111 qwe rtz uio
198 asd fgh jkl
165 yxc
789 poi uzt rew
89 lkj
File2:
#file2-header2
file2-header2
165 ghz nko2 ... (2 Replies)
trying to sort an array, only the 4th column is uniq,
have this:
dog cat bird house1
dog cat bird house2
dog cat bird house3
rose daisy tulip house1
rose daisy tulip house3
would like this:
dog cat bird house1 house2 house3
rose daisy tulip house1 missing house3
any help... (6 Replies)
Discussion started by: jimmyf
6 Replies
LEARN ABOUT CENTOS
advpng
AdvanceCOMP PNG Compression Utility(1) General Commands Manual AdvanceCOMP PNG Compression Utility(1)NAME
advpng - AdvanceCOMP PNG Compression Utility
SYNOPSIS
advpng [-l, --list] [-z, --recompress] [-0, --shrink-0]
[-1, --shrink-fast] [-2, --shrink-normal [-3, --shrink-extra]
[-4, --shrink-insane] [-f, --force] [-q, --quiet]
[-h, --help] [-V, --version] FILES...
DESCRIPTION
The main purpose of this utility is to recompress png files to get the smallest possible size.
Please note that this utility is not able to read a generic file. It's granted to be able to read only the files generated by the Advance-
MAME emulator.
To compress the files this utility uses the following strategies:
o Remove all ancillary chunks.
o Concatenate all the IDAT chunks.
o Use the 7zip Deflate implementation.
OPTIONS -l, --list FILES...
List the content of the specified files.
-z, --recompress FILES...
Recompress the specified files. If the -1, -2, -3 options are specified it's used the smallest file choice from the previous com-
pressed data and the new compression. If the -0 option is specified the file is always rewritten without any compression.
-0, --shrink-store
Disable the compression. The file is only stored and not compressed. The file is always rewritten also if it's bigger.
-1, --shrink-fast
Set the compression level to "fast".
-2, --shrink-normal
Set the compression level to "normal". This is the default level of compression.
-3, --shrink-extra
Set the compression level to "extra".
-4, --shrink-insane
Set the compression level to "insane".
-f, --force
Force the use of the new file also if it's bigger.
COPYRIGHT
This file is Copyright (C) 2002 Andrea Mazzoleni, Filipe Estima
SEE ALSO advzip(1), advmng(1), advdef(1)
AdvanceCOMP PNG Compression Utility(1)