File:Scalar fields theta.svg
![File:Scalar fields theta.svg](https://upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Scalar_fields_theta.svg/600px-Scalar_fields_theta.svg.png?20110711230427)
Original file (SVG file, nominally 600 × 480 pixels, file size: 129 KB)
Captions
Captions
Summary
[edit]DescriptionScalar fields theta.svg |
English: This diagram for the Wikiversity:Special relativity and steps towards general relativity course is used in showing that the coordinate typically called θ is a scalar field. This is a small step towards explaining the algebra of tensor fields. A scalar field is itself a (0,0) tensor field. |
Date | |
Source | Own work |
Author | Boud |
octave source code
[edit]The .svg version of the file, along with a better quality encapsulated postscript file, is produced by
- the following octave source code,
- in a local directory called /tmp
- the .svg file is about 260 times as big as the source code
- the .eps file is about 50 times as big as the source code
## (c) CC-BY-SA-3.0 or later ## octave script: visual intuition of a coordinate of the Euclidean plane ## as scalar fields on a smooth 2-manifold n_dots=30; # a small number of points - keep postscript file size small x=linspace(-1,1,n_dots); y=linspace(-1,1,n_dots); xmat=repmat(x,n_dots,1); ymat=repmat(y',1,n_dots); theta=atan2(ymat,xmat); imagesc(x,y,theta) xlabel('{\fontsize{28} scalar field \theta}') hold on plot([-1 0], [0 0],'-w','linewidth',10) ## emphasise the coordinate singularity print('/tmp/Scalar_fields_theta.eps',"-depsc","-F:20") print('/tmp/Scalar_fields_theta.svg',"-dsvg")
Licensing
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 23:04, 11 July 2011 | ![]() | 600 × 480 (129 KB) | Boud (talk | contribs) |
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File usage on Commons
The following page uses this file:
File usage on other wikis
The following other wikis use this file:
- Usage on en.wikiversity.org
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Image title | Produced by GNUPLOT 4.2 patchlevel 2 |
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