12-03-2008
Nothing is happening ...the command is just redirecting the contents of welcome to welcome1 without any difference.
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1. Shell Programming and Scripting
Hi,
Does awk ever resolve params in the search pattern?..
The following awk doesnt know how to resolve ${tables}$ inside a loop.
k=`awk '/${tables}$/ ${graph}`
The search pattern has ${tables}$ and I am narrowing down my search with a $ at the end of string.
So...this leaves me with a... (13 Replies)
Discussion started by: anduzzi
13 Replies
2. Shell Programming and Scripting
am running the small script below.
count_a=48
count_b=48
if ; then
echo "Count matched"
else
echo "count not matched"
fi
I got the below output.
/bin/ksh: [48: not found
count not matched
It was giving the same error when I ran in another box. But I inculded /bin/ksh in the... (10 Replies)
Discussion started by: sathik
10 Replies
3. Shell Programming and Scripting
Hi friends,
I have a file list1 which has these 2 columns like
616449 0
434453 1
2151083 0
2226536 0
2132382 0
2136814 0
I have to put the result of col1 -col2 into another file list2 linewise.
e.g. It gives the below result if use the below code:
awk '{ print $1 - $2 }' list1 >... (2 Replies)
Discussion started by: kunwar
2 Replies
4. Shell Programming and Scripting
Guys,
I am always struggling with awk and sed commands in UNIX,especially while writing shell script. Can you please suggest some good websites?
Cheers,
Aravind (3 Replies)
Discussion started by: AraR87
3 Replies
5. Shell Programming and Scripting
My script
----------
for i in `cat n`;do
export k=`echo "CSN: "$i` //combining CSN: and value from n
echo "$k"
awk ''{print "CSN: "$0;}'{_=29}_&&_--' file1|tail -1 >> file2
done
In the above script i cannot able to resolve $k in awk command
file n contains
------------
0000
1111... (0 Replies)
Discussion started by: Mohana29_1988
0 Replies
6. Shell Programming and Scripting
My script
----------
for i in `cat n`;do
export k=`echo "CSN: "$i` //combining CSN: and value from n
echo "$k"
awk ''{print "CSN: "$0;}'{_=29}_&&_--' file1|tail -1 >> file2
done
In the above script i cannot able to resolve $k in awk command
file n contains
------------
0000
1111
2222... (2 Replies)
Discussion started by: Mohana29_1988
2 Replies
7. Solaris
Hi guys,
I am currently receiving the following output in /var/log/syslog and is occurring every second leading to /var directory being full after every 2 days.
Aug 20 17:32:29 opaldn1 sendmail: r7KCOlQm002517: ruleset=check_rcpt, arg1=<postmaster@silverapp6>, relay=, reject=450 4.4.0... (3 Replies)
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8. Shell Programming and Scripting
I am not sure if I am posting to the right forum but I would like to buy a book which goes into Awk in detail and covers the most advanced Awk programming techniques. Would anybody be able to recommend a good book? I see plenty of books available on Amazon but I am not sure how detailed they are.... (2 Replies)
Discussion started by: kieranfoley
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LEARN ABOUT MINIX
pnmpsnr
pnmpsnr(1) General Commands Manual pnmpsnr(1)
NAME
pnmpsnr - compute the difference between two portable anymaps
SYNOPSIS
pnmpsnr [pnmfile1] [pnmfile2]
DESCRIPTION
Reads two PBM, PGM, or PPM files, or PAM equivalents, as input. Prints the peak signal-to-noise ratio (PSNR) difference between the two
images. This metric is typically used in image compression papers to rate the distortion between original and decoded image.
If the inputs are PBM or PGM, pnmpsnr prints the PSNR of the luminance only. Otherwise, it prints the separate PSNRs of the luminance, and
chrominance (Cb and Cr) components of the colors.
The PSNR of a given component is the ratio of the mean square difference of the component for the two images to the maximum mean square
difference that can exist betwee any two images. It is expressed as a decibel value.
The mean square difference of a component for two images is the mean square difference of the component value, comparing each pixel with
the pixel in the same position of the other image. For the purposes of this computation, components are normalized to the scale [0..1].
The maximum mean square difference is identically 1.
So the higher the PSNR, the closer the images are. A luminance PSNR of 20 means the mean square difference of the luminances of the pixels
is 100 times less than the maximum possible difference, i.e. 0.01.
SEE ALSO
pnm(5)
04 March 2001 pnmpsnr(1)