[Eeglablist] Double precision

[Makoto Miyakoshi]

Dear Lina and Arno,

I actually agree with Arno. As long as one sticks to GUI, this
single/double precision issue is nicely taken care of automatically.
I will update my Wiki page. Thanks.

Makoto

On Tue, May 5, 2020 at 12:59 AM Delorme, Arnaud <adelorme at ucsd.edu> wrote:

> Dear Lina,
>
> The menu is now “File > Preferences” and the option is still present.
> Makoto should update his web page.
>
> Also, for all some computations (resampling, filtering, ICA), the data is
> automatically converted to double precision (64-bits) and then the result
> is converted back to single precision (32 bits). Given that EEG signal is
> rarely acquired with more than 24-bit precision, using more than 32 bits is
> not necessary (except for filtering and ICA because of recursive processes
> where the error can add up when using 32-bit precision). So I would
> personally recommend to leave the memory option with the default value for
> data precision (it will not hurt to use it, most operations will simply be
> twice slower and take twice the RAM).
>
> Best wishes,
>
> Arno
>
> > On May 3, 2020, at 3:53 PM, Lina Ismail <linaelsherif at Knights.ucf.edu>
> wrote:
> >
> > Dear all,
> > Following makotos Pipeline, the first step is to ensure double precision
> for ICA purpose. I have downloaded the latest version V2019.1  in which
> there is no "File' -> 'Memory and other options' -> 'If set, use single
> precision under...' uncheck it." as the old version does.
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