GnuPlot - 2d-graph --> depending from size, different color
Hi,
i would like to change color depending from the valuerange.
a gnuplot-script will generate a multiplot and in one graph,
the ranges should have different colors, e.g.
100 ... 133 --> red
200 ... 233 --> blue
300 ... 333 --> orange
400 ... 433 --> green
Code:
#Partikeldata - Partikel INDEX - [ 4 ]
set size 1,0.17
set origin 0,0.32
set format x ""
#set key left Left bot font "Helvetica,8"
set noxlabel
#set log y
#set mytics 10
#set grid mytics linestyle 0 linewidth .8
set yrange [50:450]
set ytics (100,133,200,233,300,333,400,433)
#set format y "10^{%L}"
#set grid x
set key left Left bot font "Helvetica,8"
set noxlabel
set label 1 "Partikel-INDEX" at graph 1.0, graph 0.5 rotate by 90 center offset 1,0 font "Helvetica,8"
set cbrange [100:433]
set palette defined (0 "blue",17 "#00ffff",33 "white",50 "yellow",\
66 "red",100 "#990000",101 "grey")
plot "${Home}/scripte/index.txt" using 1:(\$2) t ' PD < 0,532 µm' w p pt 6 ps 0.2 lc rgbcolor "#999999"
I tried to solve it with the blue colored "set range / set palette" but it didnt work - all the generated dots are red. Can somebody help me?
Thanks in advance!
IMPe
Hi,
I'm not able to find a solution because I cant find the exact keyword for this.
I wanna make a graph like ive shown in the attachment.
Could someone please share ideas on how to do this.
Thanks! (3 Replies)
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Raphael_Varane 182
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Anyway, I'm each minute measuring temperature and humidity and saves the last 60 readings along with time in a textfile, values_minute.
The contents of the file is formatted like this: time temperature humidity
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Hi all,
I am working with a huge amount of files in a Linux environment and I was trying to filter my data. Here's what my data looks like
Name............................Size
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Discussion started by: Error404
7 Replies
LEARN ABOUT PHP
imagecolorexactalpha
IMAGECOLOREXACTALPHA(3) 1 IMAGECOLOREXACTALPHA(3)imagecolorexactalpha - Get the index of the specified color + alphaSYNOPSIS
int imagecolorexactalpha (resource $image, int $red, int $green, int $blue, int $alpha)
DESCRIPTION
Returns the index of the specified color+alpha in the palette of the image.
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.
o $alpha
- A value between 0 and 127. 0 indicates completely opaque while 127 indicates completely transparent.
The colors parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF.
RETURN VALUES
Returns the index of the specified color+alpha in the palette of the image, or -1 if the color does not exist in the image's palette.
EXAMPLES
Example #1
Get colors from the GD logo
<?php
// Setup an image
$im = imagecreatefrompng('./gdlogo.png');
$colors = Array();
$colors[] = imagecolorexactalpha($im, 255, 0, 0, 0);
$colors[] = imagecolorexactalpha($im, 0, 0, 0, 127);
$colors[] = imagecolorexactalpha($im, 255, 255, 255, 55);
$colors[] = imagecolorexactalpha($im, 100, 255, 52, 20);
print_r($colors);
// Free from memory
imagedestroy($im);
?>
The above example will output something similar to:
Array
(
[0] => 16711680
[1] => 2130706432
[2] => 939524095
[3] => 342163252
)
NOTES
Note
This function requires GD 2.0.1 or later (2.0.28 or later is recommended).
SEE ALSO imagecolorclosestalpha(3).
PHP Documentation Group IMAGECOLOREXACTALPHA(3)
08-18-2012
