write max mean as an alternative

Hi guys,

I am trying to write max() and min but our teacher said you cannot use max() and min() function. how can ı write alternativly these functions. I have done mean value like that:

 if length(m)==4 
                
                element=element+1;
                
                s =sum(m) / 4;
                
               arc = [arc s];
                 
                m=[];
                
            
           end          

every 4 step m function reset and also values that have been in m (m has 4 element at the moment) sums and divide 4. the new value (mean value of a at the moment) goes arc.

I want to da that max and min version without max and min command but this time the values has to go new set that ı called maxvalues and min values could someone help me ?

[Geoff Hayes]

Ugur - if the idea is to write your own max function given an array of elements, then just think about how you would do this. Perhaps you would start with the first element in the array and compare it to the second element in the array. What comparison would you use? Which of the two would be kept to compare to the third element in the array? Try writing out the algorithm (on paper) before you start to code it up.Unless I'm misunderstanding what you are looking for, you won't need to sum up any elements like in the code you've shown above...

[Ugur Sahin]

https://imgur.com/a/wjWhlTQ

[Image Analyst]

Ugur, post the image directly here with the green and brown frame icon, not on some third party web site.

Answer 1

[David Hill]

a=sort(x)
maxvalue=a(end);
minvalue=a(1);

[Ugur Sahin]

sorry sort function prohibited too.

[David Hill]

maxvalue=x(1);
minvalue=x(1);
for k=2:length(x)
    if x(k)>maxvalue
        maxvalue=x(k);
    elseif x(k)<minvalue
        minvalue=x(k);
    end
end

[Ugur Sahin]

thank you so much :D