How to type in a series in MATLAB

I want to create a function that when I give it some input, it takes those inputs and make those to be the coefficients of a polynomial,let me explain here: for example my input is [1 2 3 4] , so this function should create s^3 + 2s^2 + 3s^1 +4s^0 , so what I was think was to have something like : syms s a; then ask for the value of n; then say num=(a_n)*s^n + (a_n-1)*s^(n-1) + .... a_0*s^0 , I will really appreciate if some of could help me with translating this into a Matlab code, Thanks

Answer 1

[Walter Roberson]

http://www.mathworks.com/help/symbolic/poly2sym.html

Answer 2

[Vinod Rajakaruna]

√ 𝑎(2.23) 0.3 log10 25 + 𝑒 0.4 + (2.698) 2 3

[Walter Roberson]

You have which cannot possibly appear in a polynomial, so this cannot be an answer to the question that was asked.