[FieldTrip] read write MarkerFile.mrk file

[Cristiano Micheli]

Dear Vasily
I bumped into this site after a quick internet search:
https://w3.rcc.uchicago.edu/redmine/projects/cacioppo/repository/annotate/spm8_dev/external/ctf/readCTFds.m

A function's header therein referes to a CTF reference document, named
PN900-0088:

"This format is rigid and readMarkerFile assumes that the MarkerFile has
the format
current in October 2006.    The document lists 4 Class Groups, but only
CLASSGROUPID=0
(triggers) and CLASSGROUPID=3 (Manual) are actually used.  read_MArkerFile
reads only
these two groups, but it prints a message if the other groups are
encountered.
Trigger markers (CLASSGROUPID=0) have an additional 4 pieces of information
supplied:
BITNUMBER(int), POLARITY(+ or 1),SOURCE(text) and THRESHOLD (float).  FOr
CLASSGROUPID=3, these fields are left empty."

I hope this helps
Cristiano



On Tue, Mar 18, 2014 at 2:02 PM, Vasily Vakorin <vasenka at gmail.com> wrote:

> I am trying to modify file MarkerFile.mrk, using function readmarkerfile.m
> and writeMarkerFile.m.
>
> Function readmarkerfile.m create a structure with four fields:
> number_markers, number_samples,  marker_names, trial_times.
>
> However, function writeMarkerFile.m requires another field: ClassGroupId
> (only 0 and 3 are allowed).
>
> Any suggestions on how to create the "right" structure for
> writeMarkerFile.m ?
>
> Thank you,
> Vasily
>
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