Fix MATLAB Code Error: Input Argument "S" is Undefined

[plexus0208]

I get the following error with my MATLAB code. Can anyone help me fix it? I don't see what is wrong.

----------------------------------------------------------------

? Input argument "S" is undefined.

Error in ==> RCPrototype at 11
Wpay = Tmax/((CDA0/S)/CL + cd/CL + CL/(pi*AR)) - Wfuse;

-----------------------------------------------------------------

MATLAB CODE:

function [WpayMax, constraint] = RCPrototype(AR, S, lambda)

Wfuse = 2.5;
Tmax = 0.70;
CDA0 = 0.004;
cd = 0.028;
CL = 1.0;
tau = 0.11;
eps = 0.03;

Wpay = Tmax/((CDA0/S)/CL + cd/CL + CL/(pi*AR)) - Wfuse;
WpayMax = max(abs(Wpay));
constraint = 0.018*((Wfuse + Wpay)/(E*tau*(tau^2+eps^2)))*(1+lambda)^3*(1+2*lambda)*(AR^3);

[WpayMax, constraint] = RCPrototype(0.5,0.5,0.5);

end

 

[Dr Transport]

has S been defined prior to calling the function?? if not, then it isn't defined within the function itself.

 

[jhae2.718]

Try calling the function from another M-file. I'm guessing you're trying to directly run the function file.

Also, what are "E" and "lambda" defined as in your function?

 

[caffenta]

You're calling the function from within the function:

constraint = 0.018*((Wfuse + Wpay ...

[B][WpayMax, constraint] = RCPrototype(0.5,0.5,0.5);[/B]

end

You need to put that outside the function body.

 

[blue_raver22]

The error message indicates that the input argument "S" is not defined in the code. This means that the variable "S" has not been assigned a value or it is not declared in the code. To fix this error, you need to make sure that the variable "S" is defined and assigned a value before it is used in the calculations. You can also check if the variable name is spelled correctly and if it is used in the correct context. Once the variable "S" is properly defined, the code should run without any errors.