Re: An array of arrays?

[Quentin Spencer]

I think a cell array is what you're looking for. Each element of a cell
array can have a different type and different dimensions. Cell arrays
are indexed using {}. For example:

octave:1> a{1} = 1;
octave:2> a{2} = [1,1,1];
octave:3> a{3} = "string";
octave:4> a
a =

{
  [1,1] = 1
  [1,2] =

          1        1        1

  [1,3] = string
}

I hope this helps.

Quentin



Vic Norton wrote:

> 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





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