From: "Paul A." <cyril.staff@...>
Date: 2010-04-25T22:10:10+09:00
Subject: Populate (an array or a matrix) from a vector

Hello,

I have a simple, but very tricky, problem.  I would like to fix it using
an array.  But matix are possibly more appropriate (even if matrix can
not have 3 dimensional values, I think).

I would like to populate a table (of 2 or 3 dimensions), from a vector.

I think the best way to explain myself is to put some examples, with an
array such as:

>> # thanks to Rolf Pedersen's function (http://www.ruby-forum.com/topic/208620)
>> table = make_array(3, 5)

And now, if the seeder vector is: [1, 0], the result should be:

=> [
=>   [4, 3, 2, 1, 0],
=>   [4, 3, 2, 1, 0],
=>   [4, 3, 2, 1, 0]
=> ]

If the vector is: [-1, 0]

=> [
=>   [0, 1, 2, 3, 4],
=>   [0, 1, 2, 3, 4],
=>   [0, 1, 2, 3, 4]
=> ]

If the vector is: [-2, 0]

=> [
=>   [0, 0, 1, 1, 2],
=>   [0, 0, 1, 1, 2],
=>   [0, 0, 1, 1, 2]
=> ]

If the vector is: [1, 1]

=> [
=>   [2, 2, 2, 1, 0],
=>   [1, 1, 1, 1, 0],
=>   [0, 0, 0, 0, 0]
=> ]

If the vector is: [0, 1]

=> [
=>   [2, 2, 2, 2, 2],
=>   [1, 1, 1, 1, 1],
=>   [0, 0, 0, 0, 0]
=> ]

Have you got a idea, or a plan? :s
Any comments are welcome. Thank you.

Best regards.
-- 
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