Not sure what's wrong with my code
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Having trouble calling the function altidense,
Whenever i try calling the function with the command "altidense(1500) i get a "Undefined function 'altidens' for input arguments of type 'double'"
I've been tearing my hair out because the code in the function itself is fine i tried by just inputting altitude directly and it worked fine. Its just when i call it as a function that makes the code fail.
Thanks
AltVsDens = readmatrix('Rho_ISA.csv');
altidense(1500)
%function to find air density from Rho_ISA.csv
%takes altitude and extracts air density from neighbouring cell
function airp = altidense(Altitude)
cell = (Altitude/500)+1;
airp = AltVsDens(cell,2)
end
%function to calculate true airspeed
%where m = mass, p = air density, s = wing area, Cl = coefficient of lift
function V = truspeed(m,p,s,Cl)
V = sqrt((2*m*9.81)/(p*s*Cl))
end
3 个评论
You can't call a variable that is not part of a function in a function.
I would suggest adding your AltVsDens variable as an input to your function.
AltVsDens = readmatrix('Rho_ISA.csv');
altidense(1500,AltVsDens)
%function to find air density from Rho_ISA.csv
%takes altitude and extracts air density from neighbouring cell
function airp = altidense(Altitude,data)
cell = (Altitude/500)+1;
airp = data(cell,2)
end
William Xupravati
2022-2-22
Cris LaPierre
2022-2-22
It boils down to variable scope. Consider the following links
回答（1 个）
Jan
2022-2-22
0 个投票
The providing of variables as inputs and outputs as well as sharing the data using nested cells is explained in the free online tutorial: https://www.mathworks.com/learn/tutorials/matlab-onramp.html
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