Pressure calculation loop error
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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 comentarios
KSSV
el 26 de Jun. de 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).
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