How do I get this to display the maximum value of an array?

I wrote this function:

function max=maxval(x)
a=1;
N=length(x);
for j=x(1:N)
    if x(j)>a
        a=x(j);
    else
        a=a;
    end
end
max=a;
end

But when I try to use it, nothing happens. It's supposed to find the maximum value in an array but it's just not working. What am I doing wrong?

Answer 1

[Hiro Yoshino]

You should use the built-in max function:

https://www.mathworks.com/help/matlab/ref/max.html

But if you really wanted it, it would be like this:

function max=maxval(x)
    a=x(1);
    N=length(x);
    for j = 2:N
        if x(j) > a
            a = x(j);
        end
    end
    max = a;

Answer 2

[VBBV]

max = maxval(2:100)

ans = 100

function max=maxval(x)
a=1;
N=length(x);
for j=1:N  %for loop is not correctly used 
    if x(j)>a
        a=x(j);
    else
        a=a;
    end
end
max=a;
end