Function not defined error

Hi,

I have the following code snippet;

    function [mass]=ElementMassMatrix1Bar(rho_E,A_E,E_C,N_C,element_no,p,n_dof)

    J=Jacobian(element_no,E_C,N_C);

The function Jacobian is defined in another .m file.

I had thought I should be able call it.

But I get an error that,

function JAcobian not defined.

I am finding it funny because the function JAcobian is called inside another function (say 'X') but X being located in the same .m file as JAcobian.

But when I call JAcobian from a function located in another .m file, it says function not defined error,

Please can anyone help..

Thanks a lot.

Answer 1

[Walter Roberson]

Be careful with JAcobian vs Jacobian -- MATLAB considers the two to be different names.

In order to call a function in another file, the file must be named the same thing as the function and the function must be the first thing in the file. The exception to this is if the first function in the file creates a handle to the desired function and puts the handle in a useful place (such as returning it.)

[kajalschopra]

Yes, I understand about Jacobian and JAcobian.

But,

I have

function [mass]=ElementMassMatrix1Bar(rho_E,A_E,E_C,N_C,element_no,p,n_dof)

J=Jacobian(element_no,E_C,N_C);

The function ElementMassMatrix1Bar is the first function in the file ElementMassMatrix1Bar.m

But,

Jacobian function lies in another .m file.

Can't I call Jacobian as above?

Do you mean I should re-define Jacobian inside the file ElementMassMatrix1Bar.m?

[Walter Roberson]

If the other file is not named Jacobian.m then you cannot invoke it out of the other file.

Instead of re-defining it inside ElementMassMatrix1Bar.m you should move the function to its own file. You should probably rename it when you do so, such as to naming it ElementMassJacobian so that you do not accidentally invoke it from other code.

[kajalschopra]

Thank you. And, last one, I have a set of programs in D:\directoryX and another set of programs in D:\directoryY

I have ElementJacobian .m file (and the first function in the ElementJacobian.m file named as ElementJacobian) in D:\directoryX

I want to call ElementJacobian from D:\directoryY

Is it possible? How? Thanks again, Kajal

[Walter Roberson]

See addpath() and pathtool()