Why wont it output index?

function[max,index]=MyMax(x)

max=0;

[n,m]=size(x);

for i=1:m

if max<x(i)

max=x(i);

index=i;

output = [max, index];

end

end

end

Answer 1

[Sulaymon Eshkabilov]

Hi,

You have done everything correctly except for a couple of minor flaws. Here is the corrected code:

function output = MyMax(x)
     
      MAX=0;  % It is better to avoid MATLAB's function names, such as, max, min, etc to name variables
      [n, m]=size(x);
      for i=1:m
       if MAX<x(i)
       MAX=x(i);
       index=i;
       output = [MAX, index];
     end
   end
   
end

This can be tested:

>> x=linspace(-pi,pi);
>> OUT = MyMax(x)
OUT =
   1.0e+02 *
   0.031415926535898   1.000000000000000
   

Note that the easy solution of your exercise is this simple command:

   [MAX_VAL, INDEX] = max(x)

Good luck.

[Hunter Steele]

Thank you! What would i need to change to find minimum?

Answer 2

[Sulaymon Eshkabilov]

Just use:

[MAX_VAL, INDEX] = min(x)   % instead of max()

Good luck.

[Hunter Steele]

It seems to not be outputing anything.