function for m file

I was given the function:

g(x,y) = (x^2/y^4)+(cos(7*x*exp(9*y))/(x^6 + 2));

and was instructed to format it as an anonymous function:

g = @(x,y) (x^2/y^4)+(cos(7*x*exp(9*y))/(x^6 + 2));

When trying to create the m file, the contents were written as:

g = @(x,y) (x^2/y^4)+(cos(7*x*exp(9*y))/(x^6 + 2

function g = f(x,y)

g = (x^2/y^4)+(cos(7*x*exp(9*y))/(x^6 + 2));

end

When then trying to run the file, this error appears:

Error: File: g.m Line: 1 Column: 1

Using 'g' as both the name of a variable and the name of a script is not supported.

The file is to be named g.m and be called using g(x,y), x and y being any number, as per assignment instructions. What is causing the file not to run?

[Stephen23]

"What is causing the file not to run?"

The error message already tells you exactly what the problem is. Lets read it:

"Using 'g' as both the name of a variable and the name of a script is not supported."

Lets look at the information you gave about the script name:

"The file is to be named g.m ..."

Lets look at the information you gave about the variable name:

function g = f(..)

g = (..);

end

So you clearly used g for both the filename as well as the name of a variable. Which the error message clearly states is not allowed. If the error message unclear, how could it be improved?

Answer 1

[Piyush Kumar]

@Hunter, The error you are getting is due the same name of variable and script.

Here’s how you can resolve this issue:

1. Anonymous Function: If you want to use an anonymous function, you don’t need to create a separate file. You can define it directly in the command window or in a script:

g = @(x,y) (x^2/y^4) + (cos(7*x*exp(9*y))/(x^6 + 2));
% g(2, 3)

2. Function File: If you need to create a function file, ensure the file name matches the function name and avoid using the same name for variables.

% Do not add anonymous function 
function result = g(x, y)
    result = (x^2/y^4) + (cos(7*x*exp(9*y))/(x^6 + 2));
end
% Save the file as g.m and call like -- " result = g(2, 3); disp(result);

To summarize, if you need to call the function using g(x, y), you should use the second approach and ensure your file is named g.m.