Can you give us any hints? I tried findobj() but can't make progress!
You are on the right track with findobj(). The trick is what the call to "legend" does to the objects that make the solution very simple.
Make a checkerboard matrix
Find the Kronecker Tensor Product without using KRON
Number of digits in an integer
Big numbers, least significant digits
Generate a NaN...on purpose
Big numbers, repeated least significant digits
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