File:AliasingSines.svg
Summary
| Description |
English: A graph showing aliasing of an f=0.9 sine wave by an f=0.1 sine wave by sampling at a period of T=1.0, based on the raster image File:AliasingSines.png.
Français : Une graphique qui démontre le crénelage d'un signal sinusoïdal de fréquence f=0.9, confondu avec un signal de fréquence f=0.1 lors d'un échantillonnage de période T=1.0, basée sur l'image matricielle File:AliasingSines.png. |
| Date | |
| Source | Own work |
| Author | Moxfyre |
| Other versions | File:AliasingSines.png |
| SVG development | |
| Source code | Python code#!/usr/bin/python2.5
from pylab import *
from numpy import *
# create a figure
figure(figsize=(7.5,2.5))
rcParams.update({"figure.subplot.left":0.05, "figure.subplot.right":0.95,
"figure.subplot.bottom":0.1, "figure.subplot.top":0.9,
"svg.embed_char_paths":False})
# x coords from -1 to 11
x_fine = linspace(-0.4, 10.4, 1000)
x_coarse = linspace(0, 10, 11)
# sinewave w/ freq=0.9
y1 = sin(2*pi * 0.9 * (x_fine-0.5))
plot( x_fine, y1, "-", color="red")
# sinewave w/ freq=0.1
y2 = sin(2*pi * 0.1 * (x_fine-0.5))
plot(x_fine, y2, "-", color="blue")
# show aliasing
y3 = sin(2*pi * 0.1 * (x_coarse-0.5))
plot( x_coarse, y3, "o", color="black" )
vlines( x_coarse, 0, y3, color="black" ) # add the "lollipop" points
# set window and tick labels
axis([-0.5, 10.5, -1.1, 1.1])
yticks((-1.0,0,1.0), ('',0,''))
xticks(linspace(0,10,11))
# save it
savefig("AliasingSines.svg", transparent=True)
|
Licensing
Category:License migration redundant#AliasingSines.svg
 |
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. Subject to disclaimers. |
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.
