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Hi Peter,
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<div class="">Self correction: I have found the code that throws the warning, and it’s indeed thrown by a fieldtrip function. I came across an old (and lengthy: please don’t read it in detail - discussion on our deprecated bugzilla system <a href="https://urldefense.com/v3/__http://bugzilla.fieldtriptoolbox.org/show_bug.cgi?id=1998__;!!HJOPV4FYYWzcc1jazlU!_plR9VZ9cjJUT5aNhAc1jiNwug316TbIcRg19d6LReACMMCUlNs0xXScjVG8hzg_eLydkIjAeuVo6RAclUOKET7Nzq6XMTmd8LoPJQ$" class="">http://bugzilla.fieldtriptoolbox.org/show_bug.cgi?id=1998</a>
about the discontinuities in the *.ncs files. I think that the outcome of the referenced thread has resulted in the FAQ you referenced as well: <a href="https://urldefense.com/v3/__https://www.fieldtriptoolbox.org/faq/discontinuous_neuralynx/__;!!HJOPV4FYYWzcc1jazlU!_plR9VZ9cjJUT5aNhAc1jiNwug316TbIcRg19d6LReACMMCUlNs0xXScjVG8hzg_eLydkIjAeuVo6RAclUOKET7Nzq6XMTmuMDGIvg$" class="">https://www.fieldtriptoolbox.org/faq/discontinuous_neuralynx/</a>
I would select the relevant snippets of code from this page, to explore the timestamps as represented in your data file. In that way you can verify yourself whether or not the acquisition software has skipped some of them upon acquisition.</div>
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<div class="">Best wishes,</div>
<div class="">Jan-Mathijs</div>
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<div class="">On 23 Jan 2023, at 18:07, Schoffelen, J.M. (Jan Mathijs) via fieldtrip <<a href="mailto:fieldtrip@science.ru.nl" class="">fieldtrip@science.ru.nl</a>> wrote:</div>
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Hi Peter,
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<div class="">I have not worked with neuralynx data for a very long time, so any comment should be taken with a grain of salt, but I’d be tempted to say that if the computer says so, the feature in the data that causes the warning is actually in the data.</div>
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<div class="">I don’t see anything in the code base about a specific warning being thrown, and since you haven’t mentioned this in your original post: could it be that the warning is issued by the external mex-file that you installed from some other source? </div>
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<div class="">Best wishes,</div>
<div class="">Jan-Mathijs</div>
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<div class="">On 20 Jan 2023, at 18:43, Peter Kaskan via fieldtrip <<a href="mailto:fieldtrip@science.ru.nl" class="">fieldtrip@science.ru.nl</a>> wrote:</div>
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Hello all,<span class="Apple-converted-space"> </span><br class="">
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I am recording intracranial EEG data with a NeuraLynx Atlas system.<span class="Apple-converted-space"> </span><br class="">
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<span class="ContentPasted1">I'm using ft_read_data on my folder of NeuraLynx .csc channels, but I am getting a warning message.<br class="">
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<div class=""><i class="">Warning: discontinuous recording, predicted number of timestamps and observed number of timestamps differ by 157859.33</i><br class="">
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<div dir="ltr" class=""><i class="ContentPasted0">Please consult<span class="Apple-converted-space"> </span><a href="https://urldefense.com/v3/__http://www.fieldtriptoolbox.org/faq/discontinuous_neuralynx__;!!HJOPV4FYYWzcc1jazlU!7-_XqLVpShrv9VUuhF00Lr3AAbVFRKcf7GHuVU6BbKsOQD7GYgiyfblZNzX6KCdvgDlJ_K09LwPU2DqtoZA0WcvCZ23Y9wClew$" target="_blank" data-saferedirecturl="https://www.google.com/url?q=http://www.fieldtriptoolbox.org/faq/discontinuous_neuralynx&source=gmail&ust=1674322392545000&usg=AOvVaw2bKeowtWYzm-691BO7I1xQ" class="ContentPasted0">http://www.fieldtriptoolbox.<wbr class="">org/faq/discontinuous_<wbr class="">neuralynx</a></i></div>
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This little bit of info only seems to tell one how to deal with that if true; not if this is an error. I do not believe the data is discontinuous.</div>
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Has anyone got this discontinuous error message with NeuraLynx .csc files that should be / were recorded continuously?</div>
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<i class="">The low-level<span class="Apple-converted-space"> </span><code class="language-matlab highlighter-rouge"><span class="n ContentPasted5">read_neuralynx_ncs</span></code><span class="Apple-converted-space"> </span>function detects the presence of
gaps in the<span class="Apple-converted-space"> </span><code class="language-matlab highlighter-rouge"><span class="o ContentPasted5">.</span><span class="n ContentPasted5">ncs</span></code><span class="Apple-converted-space"> </span>file and issues a warning.<span class="Apple-converted-space"> </span></i><br class="">
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Can the detection fail, do I really have discontinuous data?<span class="Apple-converted-space"> </span><br class="">
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Thanks, Peter</div>
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<div class="">Peter M. Kaskan, Ph.D.</div>
<div class="">Assistant Professor</div>
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<div class="">Albert Einstein College of Medicine</div>
Leo M. Davidoff Department of Neurological Surgery</div>
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<div class="">Bronx, NY 10461</div>
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