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.
Finding Perfect Squares
The Tower of Hanoi
fly fly away
Whether the input is vector?
Replace Vector Elements
Big numbers, repeated least significant digits
Generate a NaN...on purpose
Big numbers, least significant digits
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