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.
random picture with random colours
Choose the best fitting dominoes
Doubling elements in a vector
Add two numbers
Equal to their cube
Generate a NaN...on purpose
Big numbers, repeated least significant digits
Big numbers, least significant digits
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