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## Arrays: Multidimensional manipulating

**From**: |
dirac |

**Subject**: |
Arrays: Multidimensional manipulating |

**Date**: |
Tue, 12 Apr 2011 09:22:50 -0700 (PDT) |

Hi there,
I am having problems with a multidimensional array at the moment and have
looked online to see similar problems...
I basically have an equation
p = exp(-1*(a*(|k|^b)))
which I write:
p = exp(-1*abs(k).^b).
This is simple enough so far; if I want to vary a, k, and b, I could use for
loops or I could do it using a multidimensional array (what I want to do as
I assume it'll be faster). I started by defining vectors for a, b, and k:
k = [-20:0.05:20];
b = [0:0.01:2];
a = [0:0.001:0.01];
and then tried to find p for all of the possible values of a, b and k and
store in an array of three dimansion; I tried this:
p = zeros(length(a),length(k),length(b)); %allocating memory
p = exp(-1.*a.*(abs(k)).^b)
Which doesn't seem to work.
Is this something that you can do with Octave or will I have to use for
loops?
Thanks in advance
Martin
-----
Still learning everyday.
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**Arrays: Multidimensional manipulating**,
*dirac* **<=**