A Graphical Tool for Linear Algebra

The procedure eshow graphically illustrates some concepts from introductory linear algebra. When passed a 2x2 matrix A as an argument, the procedure computes the product Au for each of several unit vectors u, and displays the results as an animation. Additionally, each frame contains textual annotations including decimal approximations of u, |u|, Au, and |Au|.

To use eshow, follow these steps...

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