[Homer-users] [Homer-Users] Error message after downsampling

[Yucel, Meryem A.]

Hi Amanda,

I change the downsample code to allow non-integer downsampling factor.
Please update your HOMER (developer's version) and try again (with downsampling factor 1.2), it should work.

Meryem


From: homer-users-bounces at nmr.mgh.harvard.edu [mailto:homer-users-bounces at nmr.mgh.harvard.edu] On Behalf Of ???
Sent: Saturday, October 14, 2017 4:51 AM
To: homer-users at nmr.mgh.harvard.edu
Subject: Re: [Homer-users] [Homer-Users] Error message after downsampling

Hi,
The attached file is the raw data. And the picture is the error message.

 I want to change the sampling rate from 12.5 to 10.42 Hz.

The processed functions I use are:

          i.              hmrIntensity2OD

         ii.              hmrBandpassFilt

       iii.              hmrMotionCorrectPCA

       iv.              hmrMotionArtifactByChannel

         v.              hmrMotionCorrectSpline

       vi.              hmrOD2Conc

      vii.              hmrBlockAvg

Thank you!

On Thu, 12 Oct 2017 21:16:09 +0000, Yucel, Meryem A. wrote
> Hi Amanda,
>
> Please send me a sample nirs file for me to reproduce the error you get.
>
> Meryem
>
>
> From: homer-users-bounces at nmr.mgh.harvard.edu<mailto:homer-users-bounces at nmr.mgh.harvard.edu> [mailto:homer-users-bounces at nmr.mgh.harvard.edu] On Behalf Of ???
> Sent: Thursday, October 12, 2017 11:09 AM
> To: homer-users at nmr.mgh.harvard.edu<mailto:homer-users at nmr.mgh.harvard.edu>
> Subject: [Homer-users] [Homer-Users] Error message after downsampling
>
> Hi ,
>
> I used the "Downsample NIRS file" in the tool menu and decreased the sampling rate of a sequence by 2.08 (Change the sampling rate from 12.5Hz to 10.42Hz).
>
> Everything was okay during the data processing, an "Error message" appeared when I opened the post-processed nirs files by Homer UI.
>
> The error message is " Error:  invalid stim matrix(s)".
>
> I wonder how to fix this problem.
>
>
>
> And I can't find any difference after downsample the nirs  file, please tell me how to downsample the data correctly.
>
> Thank you!
>
> Amanda

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