File:Lanczos-windows.svg
| Uploaded by | Kxx |
|---|---|
| Upload date | 2011-05-10T04:43:15Z |
| MIME type | image/svg+xml |
| Dimensions | 300 × 200 px |
| File size | 7.1 KB |
Summary
| Description |
English: Lanczos windows for 3 different scales: 1, 2, and 3. |
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| Date | |||
| Source |
Self-made in gnuplot. |
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| Author | Nils R. Barth | ||
| Permission (Reusing this file) |
Nils R. Barth, the copyright holder of this work, hereby publishes it under the following license:
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gnuplot source
# Graphs of Lanczos window
# Central lobe of normalized sinc, scaled to different widths
# Set terminal
set terminal svg enhanced size 300 200 fs 10
set samples 1001 # high quality
set border 31 linewidth .3 # thin border
set output "lanczos-windows.svg"
# Ranges
set xrange [-3:3] # Widest window is -3 to 3
set xtics .5 # Accords with existing graphs, provides scale
set yrange [-.1:1.1] # Slight headroom from max of 1
set ytics .2 # Accords with existing graphs
# Zero axes as guidelines, no key (self-explanatory)
set zeroaxis
unset key
###########################
# Define and plot function
###########################
sinc(x) = sin(pi*x)/(pi*x) # Normalized sinc
set parametric # Parametric to provide alt ranges
plot [t=-1:1] t, sinc(t), \
2*t, sinc(t), \
3*t, sinc(t)
Licensing
|
I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |