File:Linearchirp.png
Original file (1,250 × 875 pixels, file size: 95 KB, MIME type: image/png)
Captions
A graph of a sinusoidal linear chirp. It would be cool to show the f(t) function on the same graph. Any ideas?
Instructions
[edit]See Wikipedia graph-making tips.
Newest version created in Maxima using the command:
x(t):=sin(2*%PI*(.1+1*t)*t);
So f0 = 0.1 Hz and k = 1, according to the equation given in the article:
It was then plotted using Maxima's gnuplot interface through the command:
To convert the PostScript file to PNG:
- Open it in the GIMP (make sure you have ghostscript installed! - Windows instructions)
- Enter 500 under Resolution (it doesn't say "DPI" but I think that's what it means)
- Uncheck Try bounding box (since the bounding box cuts off the edge, unfortunately. You can try with the bounding box first.)
- Enter large values for Width and Height
- Check Color
- Check Strong anti-aliasing for both graphics and text
- Crop off extra whitespace (Shift+C if you can't find it in the toolbox)
- Possibly need to rotate it: Click Image → Transform → Rotate 90 degrees clockwise
Filters → Blur → Gaussian blur at 2.0 px(No need to blur if you use strong anti-aliasing during conversion. I see no significant difference between end results.)- Image → Scale Image...
- Width and Height at 25%
- Cubic interpolation
- You can view at normal size if you want by pressing 1, Ctrl+E
- Save as Linearchirp.png
Created by User:Omegatron using gnuplot, possibly with post-processing in the GIMP (PNG) or Inkscape (SVG)
- 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.
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.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
(In short, this means that you can copy and modify the image freely as long as you provide attribution; preferably in the form of a link back to this page.)
File:Linear-chirp.svg is a vector version of this file. It should be used in place of this PNG file.
File:Linearchirp.png → File:Linear-chirp.svg
For more information, see Help:SVG.
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File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 19:30, 4 July 2005 | 1,250 × 875 (95 KB) | Omegatron (talk | contribs) | newer better more awesome | |
19:53, 26 June 2005 | 300 × 200 (3 KB) | Omegatron (talk | contribs) | A graph or diagram made by User:Omegatron. (Uploaded with Wikimedia Commons.) Source: Created by User:Omegatron {{GFDL}}{{cc-by-sa-2.0}} Category:Diagrams\ |
You cannot overwrite this file.
File usage on Commons
The following 2 pages use this file:
- User:Omegatron/Gallery
- File:Linear chirp.png (file redirect)