Trying to calculate a volume by changing equation for volume for different variable parameter

Question

Alison Michell 2018-7-25

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/412122-trying-to-calculate-a-volume-by-changing-equation-for-volume-for-different-variable-parameter

回答： Christopher Wallace 2018-7-25

Hi, I am trying to calculate the volume of a tank given different values for radius and height of tank and liquid. My code keeps saying I have an undefined variable V. If someone could please help me figure out how to correct this I would greatly appreciate it. Thank you!

function Volume 
h = 0:10
H = 10
r = 1
Vol = zeros([],1);
rad = zeros([],1);
Height = zeros([],1);
height = zeros([],1);
for i = 0:length(h)
if h <= r 
    V = pi.*h.^2.*(3.*r-h)./3
elseif (r <= h) & (h <= H-r)
    V = 2.*pi.*r.^3./3+pi.*r.^2.*(h-r)
elseif ((H-r) <= h) & (h<=H)
    V = 4.*pi.*r.^3./3+pi.*r.^2.*(H-2.*r)-pi.*(H-h).^2.*(3.*r-H+h)./3
end 
    Vol(i) = V ;
    rad(i) = r ;
    Height(i) = H;
    height(i) = h;
end 
disp('height   volume')
disp([height;Vol])