MATLAB decomposing numbers (armstrong numbers)

[pslarsen]

Hello.
I want to solve the problem with armstrong numbers. Is there a smart way to decompose a number in MATLAB?

E.g. 57483920 = [5 7 4 8 3 9 2 0]

I want to find the numbers which has the following property:

Let k be the number of digits in a number, n, and d1,d2,d3,d4... be the digits of n.
Say n=370. Then k=3 and d1=3, d2=7 and d3=0.
Now 3^3+7^3+0^3=370. So 370 is an Armstrong number.
Armstrong iff n=d1^k+d2^k+d3^k+d4^k+..

Another Armstrong number is 153 because 1^3+5^3+3^3 = 153

 

[pslarsen]

Okay, I have written my own function but it can surely be optimized. The first 20 Armstrong numbers are:

1
2
3
4
5
6
7
8
9
153
370
371
407
1634
8208
9474
54748
92727
93084
548834

Enjoy,
Peter.

PS: To run the programme place both MATLAB-files in the same directory and run faktor2.m