matrix full of zeros

load('air.txt')
Air.temp = air(:,1);
Air.press = air(:,2);
Air_R = 0.287;


for k = 1:length(air)
    Air(k).vol = (Air_R*Air(k).temp)/Air(k).press;
end 

I am using the ideal gas law to solve for volume and I made a structure with all the information needed (pressure, temperature). I am trying to make a subfield in that structure called vol (for volume) but the matrix that comes out as a result when I look at Air.vol is a maxtrix full of zeros and then colum 35 has all the values I need. Is there a way to minimize this so there's only one colum with the values I need?

Answer 1

[Ameer Hamza]

Use element-wise division

Air(k).vol = (Air_R*Air(k).temp)./Air(k).press;
                               %^ add dot here

[Jessica Larry]

Thanks you so much!

[Ameer Hamza]

Glad to be of help.