Could anyone help me with an error in my code?

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Thobias Pereira Silva Thobias
评论： Walter Roberson 2024-1-29
function [y1] = ADDE(t,y)
y1 = zeros(size(y));
format long
%^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
%----------------------------------
% Digester configurations and tspan
global q
global V_liq % Volume of liquid part
global V_gas % Volume of gas space
%Command windon:
%Not enough input arguments.
%Error in ADDE (line 2)
%y1 = zeros(size(y))
  1 个评论
the cyclist
the cyclist 2024-1-29
编辑：the cyclist 2024-1-29
What command are you using to call ADDE?
What is the output of the following commands?
which zeros -all
which size

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回答（2 个）

the cyclist
the cyclist 2024-1-29
Ran in:
Answering the questions in my comment above will clarify things, but I expect you are calling ADDE with either no arguments or one argument. For example
ADDE(1,2)
ans = 0
works, but
ADDE(1)
Not enough input arguments.

Error in solution>ADDE (line 4)
y1 = zeros(size(y));
gives the error you see.
function [y1] = ADDE(t,y)
y1 = zeros(size(y));
end
  2 个评论
the cyclist
the cyclist 2024-1-29
That is also the error you would get if you tried to call this function using the "Run" button in the edit window (and it will also pop up a window explaining why).
Walter Roberson
Walter Roberson 2024-1-29
When you press the green Run button to run your code, then MATLAB does not go looking in the base workspace for definitions of the input parameters.
When you have named input parameters to a function, then inside the function itself, MATLAB will never search for values for the parameters. There are some circumstances under which MATLAB will search for variables, but those circumstances never apply to named parameters of the function.

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Christopher McCausland
Hi Thobias,
"Not enough input arguments" typically is thrown when the function is called without the required input variables; i.e.
[y1] = ADDE()
rather than;
t = 1:100;
y = 100;
[y1] = ADDE(t,y) % The important thing here is that t and y are defined and then included in your function call

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