circle_map, a MATLAB code which illustrates how a matrix maps points on the unit circle to an ellipse.


The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.


circle_map is available in a MATLAB version.

Related Data and Programs:


svd_circle, a MATLAB code which analyzes a linear map of the unit circle caused by an arbitrary 2x2 matrix A, using the singular value decomposition.


  1. Lloyd Trefethen, David Bau,
    Numerical Linear Algebra,
    SIAM, 1997,
    ISBN: 0-89871-361-7,
    LC: QA184.T74.

Source Code:

Last revised on 21 January 2019.