Linear Array Expansion

Function to expand an array, linearly interpolating between entries

This function expands an array by linearly interpolating between each entry, filling in with a given number of steps defined by the user.
Example:

You have an array A=[1,5,2] and want to expand it with 3 data points between each original entry.
expandArray(A,3) = 1.0000 2.0000 3.0000 4.0000 5.0000 4.2500 3.5000 2.7500 2.0000