Pressure calculation loop error
4 views (last 30 days)
Show older comments
I have to calculate the pressure at different altitudes. I have the code that calculate all of the variables to go into my pressure calculation and all of those run fine and seem to produce the values that I am looking for but when I try to run the pressure loop it says the sides have different values. Can anyone tell me where I am going wrong?
This is what I have so far:
clc;
clear all;
p(1)=1.013e5;
r=287; %Jules/kg*K
dz=200;
% =================== Gravity Calculations ============================
alt=0:200:50000;
Re=6.37e6;
g0=9.80665;
i=1:length(alt);
g=g0*((Re^2)./((alt(i)+Re).^2));
% =================== Temperature Calculations ============================
for i=1:length(alt)
if alt(i)<=11000
t(i)=((-71.5/11000).*alt(i)+15)+273;
elseif 11000<alt(i) && alt(i)<=20100
t(i)=(-56.5)+273;
elseif 20100<alt(i) && alt(i)<=32200
t(i)=((12/12100).*alt(i)-76.434)+273;
elseif 32200<alt(i) && alt(i)<=47300
t(i)=((42/15100).*alt(i)-134.063)+273;
else
t(i)=(-2.5)+273;
end
x=g./(r*t(i));
end
for i=1:length(alt)
p(i+1)=p(i).*((1/2)*x.*dz)+(1-(1/2)*x.*dz);
end
5 Comments
KSSV
on 26 Jun 2020
If you replace the loop with the given..I am not getting any error.....your error is becuse you are using x, replace ot with x(i).
Answers (0)
See Also
Categories
Find more on Multidimensional Arrays in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!