[FieldTrip] Reading data too slow

Stephen Whitmarsh stephen.whitmarsh at gmail.com
Thu Sep 21 17:52:31 CEST 2017

Hi Wenjia,

It's impossible to give specific advice with no extra information.

How slow?
Is the data read at all?
Any error messages?
What script are you exactly running and what is the output?

I would also check your computer resources (CPU and memory) during loading
to see if you are running into a memory/CPU problem specific for your
Finally, I would start with no filters. They sometimes take a while.


On 21 September 2017 at 17:30, 张文嘉 <zhangwenjia2732 at 126.com> wrote:

> Dear all,
> I have some problems in reading data into fieldtrip.
> Specifically, I used EGI system to record EEG data and preprocessed them
> with Brainvison analyzer
> Then, I exported the preprocessed data into generic data format, making 3
> files: .eeg, .vhdr and vmrk.
> Last, I used ft_definetrial and ft_preprocessing to read these data into
> FieldTrip.
> However, the reading is very very slow.
> I tried to make only 2 channels left and tried methods as follow:
> http://www.fieldtriptoolbox.org/faq/reading_is_slow_can_i_
> write_my_raw_data_to_a_more_efficient_file_format
> But, they all did not work.
> Does anyone know what I am doing wrong? Any advice very appreciated.
> Thank you
> --
> Wenjia
> NYU Shanghai
> _______________________________________________
> fieldtrip mailing list
> fieldtrip at donders.ru.nl
> https://mailman.science.ru.nl/mailman/listinfo/fieldtrip
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