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Not enough input arguments

Asked by Jiao He on 29 Nov 2011
function dy= test(t,y)  
dy = zeros(2,1); 
dy(1)=t-y(1)./t;
dy(2)=y(1)./t-y(2).*t;  (error in this line)

Error using test(line 3) Not enough input arguments

Can somebody help me to find the problem please? Thanks

1 Comment

Jan Simon on 29 Nov 2011

Please format your code as explained in the "Markup help" link on this page.

Jiao He

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3 Answers

Answer by Matt Tearle on 29 Nov 2011

From your comment to Jan: "then run it"...

If you are running it as a script then it will give this error message because test is a function, requiring t and y to be passed in as arguments. Call it as a function and it should work fine:

>> test(pi,rand(2,1))
ans =
3.1230e+000 
-2.9509e+000

0 Comments

Matt Tearle
Answer by Jan Simon on 29 Nov 2011

I guess, that you have a function called "t":

which t

Please post the complete error message in the future. It contains helpful information.

1 Comment

Jiao He on 29 Nov 2011

I was trying to solve the following differential equations:
dy1/dt=t-y1/t
dy2/dt=y1/t-2*t

parameters in the equations are time dependent.
I save this function as test.m, then run it, returns :
Error using test(line 3)
Not enough input arguments.

Jan Simon
Answer by Walter Roberson on 29 Nov 2011

What arguments are you passing to test when you invoke it?

0 Comments

Walter Roberson

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