find the first elements of a column matrix
This would be better as "find the nth element of an array." Also, a column matrix doesn't exist. Perhaps you meant column vector, though the variables in your test cases are row vectors.
Getting the indices from a vector
Insert zeros into vector
03 - Matrix Variables 5
Area of a triangle
Matlab Basics - Absolute Value
find a specific element from an matrix
Find remainder when x is divided by 3
Determine whether the input is divisible by 3 as well as 5
multiply an array by its position number
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