How to find value of large area based different values of small area?

I am trying to find overall value of wind for large zone where sample points have small zonesand all them have individual values. Also, values depend on size of zones as well. Here, large zone falls partially on other 3 zone while fully on zone 1.

Pressure in zone 1 = P1, similarly pressure in other zones = P2, P3, P4

Yellow color area in zone 1 = A1, similarly yellow color area in other zones = A2, A3, A4; total yellow area (A)= A1+A2+A3+A4

Equation should be this way for the Pressure of large zone ==> P = (P1A1 + P2A2 + P3A3 + P4A4) / A

Answer 1

[Zahrah Walid]

I'm not completely sure that I got your question but as far as I understand you want to implement this algorithm using MATLAB; if yes, this is a really easy task with various ways, for example if P1=100, P2=200, P3=300, A1=5, A2=10, and A3=15:

data=[100 5; 200 10; 300 15]; %constrcut n*2 matrix with pressures in first column and areas in second column
A=sum(data(:,2)); %total area
P=sum(data(:,1).*data(:,2))/A; %P =  (P1A1 + P2A2 + P3A3 + P4A4) / A

[Jigar]

Hello Zahrah,

No. Overall area of yellow zone is known, and how much portion of that zone falls in other zones is not known. So I need to create code for that by which I can calculate pressure based on given equation.