05-18-2009
least-square fit in Gnuplot
Does anyone know how to find the best least square fit in Gnuplot?
7 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hello everyone.
I'm a Chinese student.I want to learn something about OS, someone
suggests me start with FreeBSD or Linux. Please tell me which one is more fit
for new man. Thanks. (4 Replies)
Discussion started by: discoverer8713
4 Replies
2. UNIX for Dummies Questions & Answers
i am reading APUE now,and the OS in the book seems different from RH9,which i installed in my computer.
can you tell me if a linux environment can help me really understand the APUE?If not,which OS i should try,the BSD?
THANKS (1 Reply)
Discussion started by: mayuhao
1 Replies
3. Programming
I have 2 directories: a1 and b1
Directory b1 depends on directory a1
Using directory a1, I create a1.lib
Using directory b1, I create b1.lib
Now, using a1 and b1, I create a shared object ab1.so
I've been able to build ab1.so just fine. I made an update to file b1.c
and am now getting a... (1 Reply)
Discussion started by: houdini_1
1 Replies
4. Linux
Hi, I am getting linking error
i.e.
/ade/aime_urtk/oracle/has/include/caa_ResStateListener.hxx:79: relocation truncated to fit: R_PPC_GO
T16 vtable for CAA::ResourceStateListener
/ade/aime_urtk/oracle/has/lib//libcaad.a(caa_Main.o)(.text+0x88e6): In function `CAA::ResourceStateL... (0 Replies)
Discussion started by: jgobbur
0 Replies
5. UNIX for Dummies Questions & Answers
I am just starting out with bash scripting. I tried a simple script to find the area of a square and it didnt run.
#!/bin/bash
#script to find area of a square based on user input
if
then
echo " Usage -$0 x "
echo " where x is the dimension of the square "
exit 1
n1=$1
... (2 Replies)
Discussion started by: SnydeMz
2 Replies
6. Shell Programming and Scripting
Hi All,
I have a text file which looks like this:
computer programming
systems engineering
I want to get rid of these square brackets and also the text that is inside these brackets. So that my final text file looks like this:
computer programming
systems engineering
I am using... (3 Replies)
Discussion started by: shoaibjameel123
3 Replies
7. Shell Programming and Scripting
I would like to grep the final set of fit parameters from a gnuplot log file to form columns that look like this.
a_1001 b_1001 x_1001
a_1002 b_1002 x_1002
a_1003 b_1003 x_1003
. . .
. . .
. . .
a_1250 b_1250 c_1250
At... (8 Replies)
Discussion started by: kayak
8 Replies
LEARN ABOUT REDHAT
pnmpsnr
pnmpsnr(1) General Commands Manual pnmpsnr(1)
NAME
pnmpsnr - compute the difference between two images (the PSNR)
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)