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.
Twins in a Window
Numbers with prime factors 2, 3 and 5.
How long is the longest prime diagonal?
Mirror Image matrix across anti-diagonal
Generate a NaN...on purpose
Big numbers, least significant digits
Big numbers, repeated least significant digits
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