How to find out the impact of independents variables on dependent variable?

Hi all! I have 365 values of evapotranspiration and 365 values of temperature, solar radiation, relative humidity and wind speed which i used them to calculate the evapotranspiration. i need to know which one of these four variables affects more the evapotranspiration.. is anyone to know how to do it..?

[darova]

What this quiestion has in common with MATLAB? You didn't attach any formulas

[Thodoris Ptrks]

i need to know if there is a way to do it..

Answer 1

[Andrei Bobrov]

Let A - array of your data (365 x 5) : evapotranspiration, temperature, solar radiation, relative humidity and wind speed

c = corrcoef(A);
c = c(:,1);
[out,ii] = max(c(2:end));