Spy Easter egg

April 11, 2009 4 Comments

For the 2009 Easter holiday, I thought I’d post a Matlab Easter egg, which I found on http://www.eeggs.com/items/47352.html: spy is a built-in stock Matlab function for visualizing sparse matrices. If you run spy with no input arguments, it uses an undocumented default built-in sparse matrix that generates one of the spies in the famous Spy vs. Spy comics series:

spy;

4 Responses

Naor April 12, 2009 at 15:46 Reply

‘spy’ with no arguments was one of the first MATLAB commands I learned 🙂
another one was ‘why’ with no arguments, maybe you consider that an Easter egg as well…

Yair Altman April 12, 2009 at 23:08 Reply

@Naor – the difference is that why with no args is documented, so it’s fun but not a real Easter egg.
Spy with no args is not documented.

Image Easter egg | Undocumented Matlab April 6, 2010 at 10:28 Reply

[…] Last year I presented the Matlab Spy Easter egg for the 2009 Easter holiday. This year, slightly late, I present another Easter egg […]
Spy Easter egg take 2 | Undocumented Matlab April 5, 2012 at 00:36 Reply

[…] Three years ago, I posted a short post about Matlab’s built-in Easter egg in the spy function […]

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