Function solving for y

k=ones(4,1);

y=fsolve(cdepth,k);

function N=cdepth(Rh,theta1,y,Ax)

D=1.2; %diameter of tube in m made of smooth plastic

z=4; %elevation change of 4 m per section

L=[6 8 10 5]; %length if each section of the spiral slide

n=.01; %assumed

slope=atan(L./(pi.*D))./100; %slopes of each section of the pipes

Q3=9.921896118095368;

theta1(1)=2.*acos(1-(2.*y(1)./D));

theta1(2)=2.*acos(1-(2.*y(2)./D));

theta1(3)=2.*acos(1-(2.*y(3)./D));

theta1(4)=2.*acos(1-(2.*y(4)./D));

Ax(1)=(1/8)*(theta1(1)-sin(theta1(1))).*D.^2;

Ax(2)=(1/8)*(theta1(2)-sin(theta1(2))).*D.^2;

Ax(3)=(1/8)*(theta1(3)-sin(theta1(3))).*D.^2;

Ax(4)=(1/8)*(theta1(4)-sin(theta1(4))).*D.^2;

Rh(1)=.25.*(1-sin(theta1(1))./theta1(1)).*D;

Rh(2)=.25.*(1-sin(theta1(2))./theta1(2)).*D;

Rh(3)=.25.*(1-sin(theta1(3))./theta1(3)).*D;

Rh(4)=.25.*(1-sin(theta1(4))./theta1(4)).*D;

N(1)=((1./n).*Ax(1).*(Rh(1)).^(2/3).*slope(1).^.5)-Q3;

N(2)=((1./n).*Ax(2).*(Rh(2)).^(2/3).*slope(2).^.5)-Q3;

N(3)=((1./n).*Ax(3).*(Rh(3)).^(2/3).*slope(3).^.5)-Q3;

N(4)=((1./n).*Ax(4).*(Rh(4)).^(2/3).*slope(4).^.5)-Q3;

end

when I try to run my function I get this error code and I'm not sure why. Can anyone help?

Not enough input arguments.

Error in Final_Vogt_RV>cdepth (line 511)

theta1(1)=2.*acos(1-(2.*y(1)./D));

Error in Final_Vogt_RV (line 501)

y=fsolve(cdepth,k);

[Rik]

Original question.

Why did you edit away your question? That is extremely rude. Now the answer doesn't make sense.

[Stephen23]

http://web.archive.org/web/20201215073612/https://webcache.googleusercontent.com/search?q=cache%253ADc-jKi1IbLEJ%253Ahttps%253A%252F%252Fwww.mathworks.com%252Fmatlabcentral%252Fanswers%252F691450-function-solving-for-y+&cd=1&hl=en&ct=clnk&gl=nl

k=ones(4,1);
y=fsolve(cdepth,k);
function N=cdepth(Rh,theta1,y,Ax)
D=1.2;  %diameter of tube in m made of smooth plastic
z=4;    %elevation change of 4 m per section
L=[6 8 10 5];   %length if each section of the spiral slide
n=.01; %assumed 
slope=atan(L./(pi.*D))./100; %slopes of each section of the pipes
Q3=9.921896118095368;
theta1(1)=2.*acos(1-(2.*y(1)./D));
theta1(2)=2.*acos(1-(2.*y(2)./D));
theta1(3)=2.*acos(1-(2.*y(3)./D));
theta1(4)=2.*acos(1-(2.*y(4)./D));
Ax(1)=(1/8)*(theta1(1)-sin(theta1(1))).*D.^2;
Ax(2)=(1/8)*(theta1(2)-sin(theta1(2))).*D.^2;
Ax(3)=(1/8)*(theta1(3)-sin(theta1(3))).*D.^2;
Ax(4)=(1/8)*(theta1(4)-sin(theta1(4))).*D.^2;
Rh(1)=.25.*(1-sin(theta1(1))./theta1(1)).*D;
Rh(2)=.25.*(1-sin(theta1(2))./theta1(2)).*D;
Rh(3)=.25.*(1-sin(theta1(3))./theta1(3)).*D;
Rh(4)=.25.*(1-sin(theta1(4))./theta1(4)).*D;
N(1)=((1./n).*Ax(1).*(Rh(1)).^(2/3).*slope(1).^.5)-Q3;
N(2)=((1./n).*Ax(2).*(Rh(2)).^(2/3).*slope(2).^.5)-Q3;
N(3)=((1./n).*Ax(3).*(Rh(3)).^(2/3).*slope(3).^.5)-Q3;
N(4)=((1./n).*Ax(4).*(Rh(4)).^(2/3).*slope(4).^.5)-Q3;
end

when I try to run my function I get this error code and I'm not sure why. Can anyone help?

Not enough input arguments.
Error in Final_Vogt_RV>cdepth (line 511)
theta1(1)=2.*acos(1-(2.*y(1)./D));
Error in Final_Vogt_RV (line 501)
y=fsolve(cdepth,k);

[Rena Berman]

(Answers Dev) Restored edit

Answer 1

[Star Strider]

After making sure that all the arguments are present in your workspace, try this:

y=fsolve(@(y)cdepth(Rh,theta1,y,Ax),k);

That’s the correct syntax. If your function is correct, you should get the correct result.

See the documentation section on Anonymous Functions for details.