Attempt to execute SCRIPT ... as a function:

I am very new to MatLab and this is probably a really easy fix but functions are giving me a headache.

global fakt1 fakt2 fakt3

fakt1=2; fakt2=3; fakt3=4;

testfunktion1(10)

function erg=testfunktion1(x)

erg=fakt1*x^3+fakt2*x^2+fakt3*x;

end

I first named the file "testfunktion.m" but then got the Error "Local function name must be different from the script name". After changing the function name and trying to run the script I get the Error

">> testfunktion(10)

Attempt to execute SCRIPT testfunktion as a function: C:\Users\....."

Now I am kind of clueless on what to do.

Answer 1

[Cris LaPierre]

The issue is that you are treating your script as a function. Functions have inputs, scripts do not.

>> testfunktion(10)

Just call your script without trying to give it an input.

>> testfunktion

As is written, that will create an error about missing variable x. So either turn the entire script into a function, or define x in your script as well.

As far as learning more about MATLAB, I recommend MATLAB Onramp. Also, rather than declare your variables a global, just pass them as inputs to your function. See more here.

[Armin Schindler]

Thanks for the advice, I got it working now. The declaration of global variables was just part of the task I was given.

Answer 2

[Ameer Hamza]

What do you mean by '10' on this line

testfunktion(10)

To call a script, you just need to type the script name

testfunktion

Or you can press the big green "Run" button.

[Armin Schindler]

Thank you :) It got it working