File:Eigenvectors of a linear operator.gif
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Eigenvectors_of_a_linear_operator.gif (480 × 486 pixels, file size: 2.96 MB, MIME type: image/gif, looped, 122 frames, 12 s)
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Summary
| Description |
English: A 2x2 real and symmetric matrix represent a stretching and shearing of the plane. The eigenvectors of the matrix (red lines) are the two special directions such that every point on them will just slide on them. |
| Date | |
| Source | https://twitter.com/j_bertolotti/status/1354822527487340550 |
| Author | Jacopo Bertolotti |
| Permission (Reusing this file) |
https://twitter.com/j_bertolotti/status/1030470604418428929 |
Mathematica 12.0 code
points = Flatten[CoordinateBoundingBoxArray[{{-50, -50}, {50, 50}}, 2], 1];
sinstep[t_] := Sin[\[Pi]/2 t]^2;
M = {{1.25, 0.3}, {0.3, 0.7}};
pointstransf = (M . #) & /@ points;
\[Psi] = Eigenvectors[M] // N;
frames = Table[
ListPlot[(1 - t) points + t*pointstransf, AspectRatio -> 1, PlotRange -> {{-25.5, 25.5}, {-25.5, 25.5}}, PlotStyle -> {PointSize[0.01], Black}, Ticks -> None, AxesLabel -> {"x", "y"}, LabelStyle -> {Black, Bold} ,
Epilog -> {Red, Line[{-50*\[Psi][[1]], 50*\[Psi][[1]]}], Line[{-50*\[Psi][[2]], 50*\[Psi][[2]]}]}]
, {t, 0, 1, 0.02}];
ListAnimate[Join[Table[frames[[1]], {10}], frames, Table[frames[[-1]], {10}], Reverse[frames]]]
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
 
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
| The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
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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 | 08:49, 29 January 2021 | | 480 × 486 (2.96 MB) | Berto | Uploaded own work with UploadWizard |
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