MATLAB Central Newsreader - differnt methods to sum positive numbers to achieve a number

differnt methods to sum positive numbers to achieve a number

Amir Hossein — Fri, 12 Dec 2008 14:56:03 -0500

consider that we have a number. for example 5. i want to know how i can writhe a code to mention all the different ways that positive numbers can be summed up to give 5.
1+1+1+1+1
2+3
2+2+1

Re: differnt methods to sum positive numbers to achieve a number

Jos — Fri, 12 Dec 2008 15:45:05 -0500

"Amir Hossein " <a.gharehgozli@gmail.com> wrote in message <ghtu23$ikh$1@fred.mathworks.com>...
> consider that we have a number. for example 5. i want to know how i can writhe a code to mention all the different ways that positive numbers can be summed up to give 5.
> 1+1+1+1+1
> 2+3
> 2+2+1

What about 0.1, 0.001, pi, 4.99999999999 etc. These are also positive numbers! Or do you mean integers only?

I suggest you get some inspiration for writing your own code by looking at some of the excellent submissions by JohnD'Errico on the File Exchange.

hth
Jos

Re: differnt methods to sum positive numbers to achieve a number

Walter Roberson — Fri, 12 Dec 2008 15:50:48 -0500

Amir Hossein wrote:
> consider that we have a number. for example 5. i want to know how i can writhe
> a code to mention all the different ways that positive numbers can be summed up to give 5.
> 1+1+1+1+1
> 2+3
> 2+2+1

Consider using recursion.

--
.signature note: I am now avoiding replying to unclear or ambiguous postings.
Please review questions before posting them. Be specific. Use examples of what you mean,
of what you don't mean. Specify boundary conditions, and data classes and value
relationships -- what if we scrambled your data or used -Inf, NaN, or complex(rand,rand)?