The difference between end number in the early row and the start number in the next
Hi Power User,
I'm trying to compute this kind of text file format:
file1:
jakarta 100 150
jakarta 170 210
beijing 220 250
beijing 260 280
beijing 290 320
new_york 330 350
new_york 370 420
tokyo 430 470
tokyo 480 485
seoul 490 540
seoul 570 590
seoul 640 680
seoul 730 750
singapur 780 830
singapur 860 940
. . .
. . .
. . .
p b e
The meaning of the dots that goes away until 'p', 'b', and 'e' are the marker that the flow those data still goes on until that point. The desired output is like this:
file2:
jakarta 170 150
beijing 260 250
beijing 290 280
new_york 370 350
tokyo 480 470
seoul 570 540
seoul 640 590
seoul 730 680
singapur 860 830
. . .
. . .
. . .
p b e
The explanation, the desired data is the difference between the end number in the town in the early row and the start number in the town in the next row. The numerical difference between different cities is not asked.
I have tried this following awk script:
But the result is like this:
# jakarta 170 210
# beijing 290 320
# new_york 370 420
# tokyo 430 470
# seoul 730 750
# singapur 860 940
. . .
. . .
. . .
p b e
The '#' sign is for marking the desired data. Do you have a solution for this problem? Thank you.
Hi
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I have the following contents in an XML file
...........
...........
..........
...........
<Details = "Sample Details">
<Name>Bob</Name>
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<Address>CA</Address>
<ContactNumber>1234</ContactNumber>
</Details>
...........
.............
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abcd
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4567
7666
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21 2341 A
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21 2341 C
21 2341 C
21 2341 C
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21 4567 A
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Hi.
How can we print those rows of file2 which are mentioned in file1. first character of file1 is a row number.. for eg
file1
1:abc
3:ghi
6:pqr
file2
a abc
b def
c ghi
d jkl
e mno
f pqr
... (6 Replies)
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Discussion started by: tk2000
2 Replies
LEARN ABOUT DEBIAN
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)