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An array of arrays?


From: Vic Norton
Subject: An array of arrays?
Date: Mon, 1 Nov 2004 12:34:50 -0500

Here is my problem. I have a subroutine
   [X, S] = solsp(rtns, rtn0, noshort)
that produce a k x n matrix, X, and a k x 1 matrix, S, from a given m x n matrix, rtns, an m x 1 matrix rtn0, and a (possibly empty) submatrix, noshort, of [1 : n]. The integers m and n are fixed, but k, the number of rows of X and S, varies, depending on the data matrices rtns and rtn0.

The matrices rtns and rtn0 are actually samples of historical returns on certain investments ending at a certain week. I would like to run through a bunch of end-weeks (wk = 1, 2, ..., N) and collect and save the corresponding [X, S] output. The natural data structure would be a list [X(wk), S(wk)] (wk = 1, 2, ..., N) of pairs of arrays of varying row dimensions, k(wk) (wk = 1, 2, ..., N). Is there any reasonably efficient way to create and save such a data structure in Octave?

Note, all arrays contain floating point numbers except for the fixed integer array noshort.

Any ideas would be greatly appreciated.

Regards,

Vic Norton

--
*---* mailto:address@hidden
|     Victor Thane Norton, Jr.
|     Mathematician and Motorcyclist
|     phone: 419-353-3399
*---* http://vic.norton.name



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