Calculating antenna directivity in MATLAB

Hi there,

I want to calculate directivity of the antenna in MATLAB. I have a matrix of 72*37 which are measured values in an anechoic chamber of radiation intensity at different values of theta and phy.

The thing is i dont know MATLAB and its start of my project to take measurements. I want to plot directivity from these measurements.

Now the values are taken at theta angles of 0 5 10 15....180. Same for the phy angles also. So that means i have a matrix of theta as one single row and angles of phy as one single column such as

0 5 10 15 20...180
5
10
15
20
.
.
.
180

The measured radiation intensity is like a matrix of 72*37

-57 -58 -59
-48
-70

and so on.

So 1st value in dBm of -57 is the value when theta and phy are 0. The value -58 is when theta is 5 and phy is zero.

I have tried to explain in best way i can.. I need to develop a code for this. GUYSS PLS HELP ME...