Not enough input arguments in function? Help!!

Question

Danielle Moore 2016-2-22

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/269461-not-enough-input-arguments-in-function-help

编辑： jgg 2016-2-22

I have the function

function z = funct(t,S)
z = 0.4*S-((0.4*S.^2)./10);

and

function euler(func,S0,dt,t0,tf)
% Time interval
t=t0:dt:tf;
% Loop using Euler's method
for i = 1:length(t)-1
    S(i+1) = S(i) + dt*(feval(func,t(i),S(i)));
end
t=t'
S=S'
plot(t,N)
xlabel('Time')
ylabel ('S')

when I type this into command window

euler(funct,7,.001,0,25)

I get this error

Not enough input arguments.
Error in funct (line 2)
z = 0.4*S-((0.4*S.^2)./10);

PLEASE HELP!!!!-

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jgg 2016-2-22

编辑：jgg 2016-2-22

Are you sure you posted all your code? I can't replicate your error: I get that S is undefined in Euler, since you never declare it anywhere. If I correct it so S = S0 (to start) I then get another error about N.

Also I notice that funct doesn't use t at all.

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