yep, I never thought I would use that formula but in polar case, I need to use. Thanks for the help and information. I have found a different answer also. Here I learned that you can directly use as vectors;
which is similar to your logic, subtracting the values from the origin.
Hi again. Sorry if it seems like I'm spamming the boards a bit, but I figured I might as well ask all the questions I need answers to at once, and hopefully at least get some.
I have installed Solaris 10 on a server. The default text editors are there (vi, ex, ed, maybe others, I know emacs is... (4 Replies)
Hi,
I am trying to make a plot of an ASCII file using GNUplot, but I keep getting error msg:
for example plot filename.txt
It says that (.txt ) is not identified ... I tried to write it without the .txt part, but I also get the error msg.
Any idea why? :confused: (1 Reply)
Hi I am trying to fit my histogram data with a gaussian model and am encountering two problems:
1. I can't seem to fit the histogram data with a model
fit y(x) 'bin.txt' using 2:xtic(1) via a,b,c (error: need 2 to 7 using specs)
2. Even when I manually guess the correct parameters for my fit and... (1 Reply)
Dear all,
I have numerous dat files (a.dat, b.dat...) containing 500 numeric values each. I would like to count them, based on their range and obtain a histogram or a counter.
INPUT:
a.dat
1.3
2.16
0.34
......
b.dat
1.54
0.94
3.13
.....
... (2 Replies)
I have a single file that looks like this:
1.62816
1.62816
0.86941
0.86941
0.731465
0.731465
1.03174
1.03174
0.769444
0.769444
0.981181
0.981181
1.14681
1.14681
1.00511
1.00511
1.20385
1.20385 (2 Replies)
Hi All,
I am new to Grace and would like to plot histograms. My input files have one column for frequencies and another column for distances, for example:
1 2.6
4 2.7
5 2.8
2 3.9
2 4.0
4 4.7
4 4.8
4 4.9
...
I want to plot a histogram ranging from 0 to 10 with... (0 Replies)
I am new to R and would like to calculate the percentage frequency distribution of h1 and h2. How can I combine h1 and h2 in one plot? I tried the following code.
h1=c(5.18,4.61,3.30,7.58,3.00,3.80,1.95,2.67,2.77,2.73,2.33,3.36,3.50,1.91,4.25,3.87,2.86,2.26,2.00,3.86,3.33,3.59,4.00)... (0 Replies)
Hi,
I have 2 files with similar structure - reference and test that I would like to BIN both and generate the comparison.
input files structure is:
a 3
b 10
c 3
d 7
e 1
f 4
g 9
h 6
I would like the output to be (lets say both reference and test are the file above - no diff)
BIN ... (3 Replies)
Discussion started by: yan1
3 Replies
LEARN ABOUT PHP
imagecolorexact
IMAGECOLOREXACT(3) 1 IMAGECOLOREXACT(3)imagecolorexact - Get the index of the specified colorSYNOPSIS
int imagecolorexact (resource $image, int $red, int $green, int $blue)
DESCRIPTION
Returns the index of the specified color in the palette of the image.
If you created the image from a file, only colors used in the image are resolved. Colors present only in the palette are not resolved.
PARAMETERS
o $
image -An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(3).
o $red
-Value of red component.
o $green
-Value of green component.
o $blue
-Value of blue component.
RETURN VALUES
Returns the index of the specified color in the palette, or -1 if the color does not exist.
EXAMPLES
Example #1
Get colors from the GD logo
<?php
// Setup an image
$im = imagecreatefrompng('./gdlogo.png');
$colors = Array();
$colors[] = imagecolorexact($im, 255, 0, 0);
$colors[] = imagecolorexact($im, 0, 0, 0);
$colors[] = imagecolorexact($im, 255, 255, 255);
$colors[] = imagecolorexact($im, 100, 255, 52);
print_r($colors);
// Free from memory
imagedestroy($im);
?>
The above example will output something similar to:
Array
(
[0] => 16711680
[1] => 0
[2] => 16777215
[3] => 6618932
)
SEE ALSO imagecolorclosest(3).
PHP Documentation Group IMAGECOLOREXACT(3)