[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Octave-bug-tracker] [bug #34352] sprand/sprandn density argument is not
From: |
Rik |
Subject: |
[Octave-bug-tracker] [bug #34352] sprand/sprandn density argument is not very accurate |
Date: |
Wed, 21 Sep 2011 05:51:11 +0000 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:5.0) Gecko/20100101 Firefox/5.0 |
URL:
<http://savannah.gnu.org/bugs/?34352>
Summary: sprand/sprandn density argument is not very accurate
Project: GNU Octave
Submitted by: rik5
Submitted on: Tue 20 Sep 2011 10:51:10 PM PDT
Category: Libraries
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Inaccurate Result
Status: None
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: dev
Operating System: GNU/Linux
_______________________________________________________
Details:
The sprand routine creates a random sparse matrix filled to a density D. In
practice, the resulting matrix density is usually 1-36% different from the
requested value.
Sample code
x = sprand (1000, 1000, 0.9);
density = nnz (x) / 1000^2
density = 0.59345
_______________________________________________________
Reply to this item at:
<http://savannah.gnu.org/bugs/?34352>
_______________________________________________
Message sent via/by Savannah
http://savannah.gnu.org/
- [Octave-bug-tracker] [bug #34352] sprand/sprandn density argument is not very accurate,
Rik <=