I need to find the max value of an Array without using builtin functions

Write out by hand a MATLAB script for finding the maximum value within an array, A. Assume the array is given and you can calculate the size of the array using the MATLAB command size. You cannot use any other MATLAB built-in functions, including max.

I don't even know how to start this process. Not asking for the assignment to be done for me. Just some tips or hints. Thanks

[John D'Errico]

So, if no builtin functions, then you cannot use the greater than operator, since gt.m is builtin. Same for any other tests. For loops and while loops are also builtin, as well as addition, multiplication, etc. Are you allowed to write low level machine code? :)

[Stephen23]

"Write out by hand a MATLAB script..."

By hand !?!?

[Star Strider]

It’s been a very long while since I wrote in assembler, but if I remember correctly, even machine code has relational and conditional operators. Barring all of them at any level makes this assignment absolutely impossible.

Answer 1

[Star Strider]

Relational operators such as < or <= and others might be useful. Since you’re allowed to use size, read the documentation on for and if as well.

[Kamie Hopper]

I finally got it. And I used

a=(blah)
[m,n]= size(a)
For I=1:1:m
  For j=1:1:n
    If blah 
.       X=max
.    Else stuff

And went from there. It's too hard to respond from my phone. But thanks for the correct answer!. And yes we do a lot of code by hand. It has been helpful.

[Star Strider]

My pleasure!