Code error trying to find the max h
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Code not running fully. Continuous errors in code. I am trying to find the maximum h given f1, the other equations and other variable limitations.
% Variables
h = 10:0.01:16;
r = 14:0.01:22.13;
I = (pi*(r*2).^4)/(64);
P = ((4/3)*pi*(r.^3-(r-0.0127).^3)*7800*9.8)+((4/3)*pi*((r-0.0127).^3)*1000*9.8);
Pcr = (((pi)^2)*206*10^9*I)./(4*h.^2);
z = P <= Pcr/2;
f1 = -1*(h+2*r);
figure;
plot(r, h, 'o-');
xlabel('Radius');
ylabel('Height');
title('Problem 4i');
grid on;
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Answers (1)
Walter Roberson
on 20 Sep 2023
You have I divided by h where I is the size of r. But r and h are row vector of different lengths.
If each h has a corresponding r then make them the same length.
If r and h are varying independently and you want to find the best combination then make one a column vector instead of a row vector and switch to a 3d plot or contour plot instead of a line plot
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