How to write this function in MATLAB

Hello , I am trying to calculate the DTFT of a sequence and compare it using freqz function....

The DTFT of my sequence is

How do I program this in MATLAB ....

w is vectorized quantity

L = 40

[darova]

Please provide your attempts

Answer 1

[Drishan Poovaya]

I understand you want to write this function in MATLAB with w as a vector. The code below should accomplish this

Pw = L*exp(-1i*w*(L-1)/2).*(sinc(w*L/(2*pi))./sinc(w/(2*pi)));