Error propagation function for data arrays

This function calculates the function value(s) and uncertainty(ies) of a function f(u1,u2,...,ui),

First define a symbolic function f(u1,u2,...,ui) using the syms command.

Next, define a vector u=[u1,u2,...,ui] containing all variables of f.

Define an 1 x i row vector q=[q1,q2,...,qi], containing the values that the function will be evaluated in. Define also an sq=[sq1,sq2,...,sqi] vector, containing the uncertainty on every value in q.

q and sq can also be m x i matrices (for varying values of qi and sqi). You can also have varying qi and a fixed sqi (the function will recognize if sqi is fixed (a row vector) or changing (a matrix).

The function will output an m x 2 matrix with the first column containing f(q) and the second column the error propagation of f(q) using this formula:

http://quicklatex.com/cache3/ql_57dd8db09fd6da8299de031e67dc4699_l3.png

P.s.: a small example is also included in the code...