File:Chirp animation.gif
From formulasearchengine
Jump to navigation
Jump to search
Chirp_animation.gif (640 × 479 pixels, file size: 234 KB, MIME type: image/gif, looped, 11 frames, 5.5 s)
This file is from Wikimedia Commons and may be used by other projects. The description on its file description page there is shown below.
Summary
DescriptionChirp animation.gif |
English: Chirp and impulse signals. |
Date | |
Source | Own work |
Author | Andrew0090 |
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
Source code (Octave)
% Generate a chirp signal animation
% To combine frames into an animated .gif file use:
% convert -delay 50 output/*.png chirp_animation.gif
N=513;
freqs=200;
t = linspace (-0.5, 0.5, N);
n=0;
lw = 2;
fs = 10;
fw = 'bold';
for dispersion = linspace (-0.001, 0.001, 11)
sig = zeros (freqs, N);
for f = 1:freqs
sig(f,:) = cos (f * pi * (t - dispersion * f));
end
subplot (2, 1, 1);
plot (t, sum (sig, 1), 'r', 'linewidth', lw);
axis([-0.5, 0.5, -100, 200]);
set(gca, 'fontsize', fs);
set(gca, 'FontWeight', fw);
set(gca, 'linewidth', lw)
set(gca, 'XTick', linspace (-0.5, 0.5, 5));
grid;
subplot (2, 1, 2);
hold off;
plot (t, sig(1,:), 'linewidth', lw);
hold on;
plot (t, sig(4,:) + 3, 'linewidth', lw);
plot (t, sig(16,:) + 6, 'linewidth', lw);
plot (t, sig(64,:) + 9, 'linewidth', lw);
plot ([1,1]*dispersion*1, [-1.2,1.2], 'r', 'linewidth', 6);
plot ([1,1]*dispersion*4, [1.8,4.2], 'r', 'linewidth', 6);
plot ([1,1]*dispersion*16, [4.8,7.2], 'r', 'linewidth', 6);
plot ([1,1]*dispersion*64, [7.8,10.2], 'r', 'linewidth', 6);
axis([-0.5, 0.5, -1.5, 10.5], 'labelx', 'tickx');
set(gca, 'fontsize', fs);
set(gca, 'FontWeight', fw);
set(gca, 'linewidth', lw)
set(gca, 'XTick', linspace (-0.5, 0.5, 5));
grid;
pause(0.5);
n = n+1;
filename=sprintf('output/%05d.png',n);
print(filename, '-S640,480');
end
The categories of this image need checking. You can do so here.
|
Items portrayed in this file
depicts
some value
5 December 2013
image/gif
3207f8a55361d0c07848b60755e11d785551c330
239,398 byte
5.5 second
479 pixel
640 pixel
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 21:52, 5 December 2013 | 640 × 479 (234 KB) | wikimediacommons>Andrew0090 | Color and thickness of phase markers. |
File usage
There are no pages that use this file.
Retrieved from "https://en.formulasearchengine.com/wiki/File:Chirp_animation.gif"