I really don't see the point of that kind of problems where you can't use Matlab built-in functions.
Read a column of numbers and interpolate missing data
Project Euler: Problem 10, Sum of Primes
Back to basics 21 - Matrix replicating
05 - Vector Equations 1
Wind Chill Computation
Set the array elements whose value is 13 to 0
Generate a string like abbcccddddeeeee
Join Strings with Multiple Different Delimiters
Unique values without using UNIQUE function
Set some matrix elements to zero
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