Matlab function error 'Not enough input arguments.'

I have this simple matlab function which displays the error as indicated below whenever I run it. Can someone help please?

function [minimum, maximum] = extrema(X)

minimum = min(X);

maximum = max(X);

end

error: extrema

Not enough input arguments.

Error in extrema (line 2)

minimum = min(X);

Answer 1

[madhan ravi]

You didn't call the function instead you just ran the function which requires input X

X=rand(1,10);
[minimum, maximum] = extrema(X) %function call

function [minimum, maximum] = extrema(X)  %function definition
minimum = min(X);
maximum = max(X);
end

[Imani Pacifique]

just past your code on a script, and below is the result.

Error: File: extrema.m Line: 3 Column: 31

Function with duplicate name "extrema" cannot be

defined.

[madhan ravi]

so you have a file named as extrema.m either change it's name or delete it

[Imani Pacifique]

i think the problem is matlab version. bcoz my codes that I posted I did take from a tutorial I am watching which I believe they are using a previous version.

[Walter Roberson]

When you have aa function in aa script file then the script file must not be the same as the function .

[madhan ravi]

ah... which version are you using if prior to 2016b then save the function as a function file with the name of the function and just run the paste the first two lines of my answer in command window I can run the codes without an error if you still have problem then you didn't follow my instructions properly.

[Imani Pacifique]

I am using 2018b.

could you please copy my initial codes on a script and see if it works for you?

[madhan ravi]

My answer works without any errors for me!. What code are you trying ? upload it here , did you see sir Walter's comment??

[Imani Pacifique]

function [minimum, maximum] = extrema(X)
minimum = min(X);
maximum = max(X);
end

try that on a script please.

[madhan ravi]

but before that see

https://in.mathworks.com/matlabcentral/answers/434703-matlab-function-error-not-enough-input-arguments#comment_648093

https://in.mathworks.com/matlabcentral/answers/434703-matlab-function-error-not-enough-input-arguments#comment_648094

[Imani Pacifique]

Thanks so much. it works now. you were right. I was running the function instead of calling it.

[madhan ravi]

Anytime :)