[Eeglablist] Qs about single vs. double precision

[Monica Parelkar]

Thanks Makoto for the web-links! I am a newbie in the EEG area. I located the webpage where I read Matlab becomes unstable with single precision data. I am sorry I confused this with Matlab 2014 when this issue was posted in 2008! Here is the link:

http://sccn.ucsd.edu/pipermail/eeglablist/2008/002252.html

Based on what was discussed on this weblink, does the current EEGlab by default store data as double precision when data is imported from EEGLab in floating point format?

Thanks,
Monica

________________________________
From: Makoto Miyakoshi [mmiyakoshi at ucsd.edu]
Sent: Wednesday, February 11, 2015 2:35 PM
To: Monica Parelkar
Cc: EEGLAB List
Subject: Re: [Eeglablist] Qs about single vs. double precision

Dear Monica,

single
http://matlab.izmiran.ru/help/techdoc/matlab_prog/ch11_st4.html#56685
double
http://matlab.izmiran.ru/help/techdoc/matlab_prog/ch11_st4.html#58265

> I once read in one of your emails that Matlab 2014 becomes unstable is it is single precision EEG data and that double precision data is better.

Really? If you say some of EEGLAB/Matlab functions cannot handle single precision data since default is double, that makes sense.

Makoto


On Fri, Feb 6, 2015 at 1:18 PM, Monica Parelkar <mparelkar at cfri.ca<mailto:mparelkar at cfri.ca>> wrote:
Hi,

I once read in one of your emails that Matlab 2014 becomes unstable is it is single precision EEG data and that double precision data is better. I googled up to understand what is single vs. double precision data but could not find any information.

Can someone please explain what they are or provide a weblink I can read up?

Thanks,
Monica

Monica Parelkar
Research Assistant (Dept. of Psychiatry, UBC)
CFRI-Centre for Autism Research
938 West 28th Avenue, 3rd floor, Workstation 3
Vancouver, BC V5Z 4H4

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--
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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