Error calling 'int'. This call-site passes more inputs to this function than it can accept.

I'm trying to make a user defined function for integration. It gives an error Error calling 'int'. This call-site passes more inputs to this function than it can accept.

My code is:

 function y = fcn(u,a,b)
%#codegen
y=int(u,a,b)
end

where a = t-0.1 ;

b=t

t is input from clock

Please help how to resolve this.

[Walter Roberson]

What shows up for

which -all int

Normally int is a function from the symbolic toolbox that needs to be passed a symbolic expression or symbolic function for the first parameter. The symbolic toolbox can only be used in Simulink in restricted situations after special setup.

[Kiran Mahmood]

I added eml.extrinsic('int') to my code and the issue is resolved but a new error: Undefined function 'int' for input arguments of type 'double'. Now how can i change upper and lower bounds for time integration ?

[Walter Roberson]

Are you sure you want to do symbolic integration?

What I suspect is that you want to use trapz()

[Kiran Mahmood]

Yes it is not a symbolic integration. What I'm trying to do is..I want to integrate a function over time from t-h to t. where t is simulation running time and h=0.1

Answer 1

[madhan ravi]

what happens when you do this :

y = integral ( @(t) u,a,b )

[Kiran Mahmood]

it says Anonymous functions are not supported for code generation. Function 'State Predictor (remote)/MATLAB Function' (#23.110.111), line 6, column 16: "@"

[madhan ravi]

or

function y = fcn(u)
a = t-0.1;
b = t;
%#codegen
y=int(u,a,b)
end

[Kiran Mahmood]

Undefined function or variable 't'. I don't know how to set this t as simulation time.