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Array elements extraction [message #67796]

Sat, 29 August 2009 09:21

moxament
Messages: 26
Registered: April 2008

Junior Member

Dear All,

I have a question in IDL and I need your help please!! The question is
the following:

Let’s say that we have the following three-dimensional array I = array
(6, 4, 3):

3 8 9 2 9 4 2 4 1 8 9 2 6 3 6 3 4 5
2 4 8 2 1 9 3 2 3 3 9 1 2 3 1 1 9 0
2 1 3 2 3 2 2 9 0 3 0 1 3 5 2 9 9 8
4 5 1 9 2 2 2 9 3 0 2 2 2 4 8 2 9 3

I need to move a 3x3 window and extract the elements of I in each step
of the moving window in a new array. For example, when the window is
on the element (2, 1, 3) the extracted array is:

M = 8 4 3
9 1 6
2 8 3
4 2 3
8 3 1
2 3 1
1 9 5
3 0 2
2 3 9

For each step the needed number = determinant(transpose(m) # m) which
will be stored in a new array D. Attention should be paid when the
window moves on the edges of the array I.

Thank you in advance!!

MD

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Array elements extraction

By: moxament on Sat, 29 August 2009 09:21

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