replace matlab function with algorithm

this is my current code. how do i replace the isperfect function to n = p1 · p2 · ... · pt

disp('Perfect numbers!');
disp('Enter two numbers(intervals)');

num1 = input('Enter num1 value: ');
num2 = input('Enter num2 value: ');
fprintf('Perfect numbers between %d and %d are: ', num1, num2);

for i = num1:num2
if isperfect(i)~=0
 fprintf('%d, ',i) 

end
end

[dpb]

I dunno...what do you think is a "perfect" number?

[Adam]

isperfect is not a builtin Matlab function so I don't see what the problem is. You can program an algorithm in a function called isperfect just like any other function.

Indeed, if such a function doesn't exist on your system then that code will not run anyway.

[Josaiah Ang]

thank Adam. thanks for the clarification. in this case, is something wrong with the code for me to get the perfect number?

Answer 1

[Al Dente]

your tags say prime, so I assume you want to find out prime numbers:

isprime(i)~=0

would that be the answer to your question?

[Josaiah Ang]

sorry i tag wrongly.

i want to display the perfect numbers between the 2 input by user.

Answer 2

[Roger Stafford]

I have given you a pretty good hint four days ago at solving your problem in the #218267 Answers thread. Why don't you try using it?

[Josaiah Ang]

Thank you Roger. Appreciate the hint you have given. As I just picking up matlab 2 weeks ago, Im kinda lost with the hint you have given. Apologies for that obvious hint you have given.

[Roger Stafford]

In all your remarks, Josaiah Ang, there is no evidence that you actually understand the meaning of a perfect number. If that is true, getting an understanding should be your next move. You can read about it at:

   http://en.wikipedia.org/wiki/Perfect_number

or at a number of other sites as well.

Your next move after that should be to do some computation by hand and see why 6 and 28 are perfect numbers and others in between are not.

At that point you will hopefully be ready to make use of the hint I have given you in #218267.

[Josaiah Ang]

Hi Roger, Do you think i'm anywhere close to that?

 disp('Perfect numbers!');
  disp('Enter two numbers(intervals)');
  num1 = input('Enter num1 value: ');
  num2 = input('Enter num2 value: ');
  fprintf('Perfect numbers between %d and %d are: ', num1, num2);
  for N = num1:num2-1;
  S = sum(N(mod(n,N)==0));
   fprintf('%d, ',s) 
  end
  end