Writing my own function to find one-norm

I am trying to write a function called normone that accepts a rectangular matric as a parameter and calculates the one-norm. I know this can be done by norm(A,1) but I am trying to write my own function. Below is my code but it is not giving me the correct answer.

function f = normone

seed = 7;

rng(seed)

A = rand(n,n);

f = norm(A, 1);

end

Answer 1

[Jalaj Gambhir]

Hi,

If you want the function to accept the matrix as a parameter, you need:

function f = normone(A)
f = norm(A,1);
end

You can call this function by:

>> A = rand(3)

A =

    0.4149    0.7094    0.9555
    0.0014    0.5243    0.6829
    0.0923    0.6962    0.0531

>> normone(A)

ans =

    1.9299

Other alternative to write a function similar to what you mentioned in the question is:

function f = normone(n)
seed = 7;
rng(seed);
A = rand(n,n);
f = norm(A,1);
end

which can be called using:

>> normone(4)

ans =

    2.2513