- you have saved the function as a local function (i.e. after some other code in script or after another function),
- you have saved the Mfile somewhere that is not on the MATLAB Search Path.

# Why is my function not recognized?

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function myEquation (x)

a = 0.4361836;

b = 0.1201676;

c = 0.937298;

r = (e^(-0.5*(x^2)))/(2*pi)

t = 1/(1+(0.3326*x))

phi = 0.5 - r*((a*t)-(b*(t^2))+(c*(t^3)))

fprintf('The value of Φ(x) is: %i', phi)

fprintf('\n')

end

This is my current code. I am trying to use it to solve for the value of phi, and then print it. However, when I try to call it from the Command Window, it just says it is an unrecognized variable or function.

##### 1 Comment

Stephen23
on 9 Feb 2024

"However, when I try to call it from the Command Window, it just says it is an unrecognized variable or function."

Most likely:

### Accepted Answer

VBBV
on 9 Feb 2024

myEquation(2)

function myEquation (x)

a = 0.4361836;

b = 0.1201676;

c = 0.937298;

r = exp(-0.5*(x^2))/(2*pi)

t = 1/(1+(0.3326*x))

phi = 0.5 - r*((a*t)-(b*(t^2))+(c*(t^3)))

fprintf('The value of Φ(x) is: %i', phi)

fprintf('\n')

end

##### 3 Comments

Stephen23
on 9 Feb 2024

Edited: Stephen23
on 9 Feb 2024

"How would I call this from the command window?"

Like this:

myEquation(2)

What is probably more important is where you have saved that function:

- it must be the main function in an Mfile (i.e. it cannot be a local function or a nested function or part of a script),
- the Mfile must be on the MATLAB Search Path (simplest is to save it in the current directory).

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