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.
Add two numbers
Acidity of vinegar and salts
Compress strings (not springs)
Determine the number of odd integers in a vector
Generate a NaN...on purpose
Big numbers, repeated least significant digits
Big numbers, least significant digits
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