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From: | Mark van Rossum |
Subject: | [Octave-bug-tracker] [bug #60076] signal xcorr bug for large datasets |
Date: | Thu, 18 Feb 2021 12:50:59 -0500 (EST) |
User-agent: | Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36 |
URL: <https://savannah.gnu.org/bugs/?60076> Summary: signal xcorr bug for large datasets Project: GNU Octave Submitted by: cosine Submitted on: Thu 18 Feb 2021 05:50:57 PM UTC Category: Octave Forge Package Severity: 3 - Normal Priority: 5 - Normal Item Group: Incorrect Result Status: None Assigned to: None Originator Name: Originator Email: Open/Closed: Open Release: 5.2.0 Discussion Lock: Any Operating System: GNU/Linux _______________________________________________________ Details: Hi The attached file creates a telegraph noise process (a timeseries that flips between two values). Matlab produces the expected outcome when calling 'xcov' or 'xcorr', but with Octave's signal-1.4.1 package I get wild fluctuations in the plot. For simple tests such as a=1:10; xcorr(a,a,'unbiased') Matlab and Octave return the same result. Mark _______________________________________________________ File Attachments: ------------------------------------------------------- Date: Thu 18 Feb 2021 05:50:57 PM UTC Name: telegraph_noise_bug.m Size: 477B By: cosine script showing the effect <http://savannah.gnu.org/bugs/download.php?file_id=50879> _______________________________________________________ Reply to this item at: <https://savannah.gnu.org/bugs/?60076> _______________________________________________ Message sent via Savannah https://savannah.gnu.org/
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