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## Re: Memory Allocation, Plotting

**From**: |
Kai Habel |

**Subject**: |
Re: Memory Allocation, Plotting |

**Date**: |
Sat, 25 Nov 2000 14:02:10 +0100 |

Thomas Viehmann wrote:
>* *
>* Hi,*
>* *
>* I'm using "debianized" Octave 2.1.31 and encountered two problems:*
>* 1. How can I change the labels "line x" in my plots?*
>* 2. I've tried a "diag(x)" with a 10000 item vector (yes, that*
>* was part of a somewhat awkward attempt to avoid for loops)*
>* which resulted in (of course) an out-of-memory error. So the*
>* questions*
>* that I derived are*
>* - for my concrete problem: Is there an elegant way of*
>* calculating diag(x)*y with x Üin R^n, y Üin R^{n*m}?*
>* - for the diag problem in a more general way: are there*
>* routines/plans to implement routines for sparse matrices?*
>* *
Hello Thomas,
1.)
i.e.
plot(x,y,'b;test;');
plots a blue line with key: "test"
2.) Have you looked at the sparse package by Andy Adler. It uses the
SuperLU lib. You can download it from [1] or using anonymous cvs from
[2]. I just tried it for a real problem and it works very well (spline
approximation).
[1] http://users.powernet.co.uk/kienzle/octave/index.html
[2] http://sourceforge.net/cvs/?group_id=2888 (take the octave module)
hope this helps.
Bye Kai
--
Kai Habel
mailto:address@hidden
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