[Homer-users] Question about configuring .cfg file

[Matthew Cloud]

Dear Venkata,

Have you been able to run the example HomER data (not your Hitachi data)
successfully?

If so, I would suggest converting just the first 500 time points and see if
you still get an error.

Also, the Hitachi output sometimes has an output error for the time points
where sometimes the exact same time point (due to round off error and
significance) is used which causes errors in both HomER and NIRS_SPM.  You
might try replacing that column with one that has slightly different times
or an added degree of significance i.e. if it shows 0.1, 0.1, 0.2... make
it 0.10, 0.15, 0.20... .

I hope that helps!

Matthew Cloud, MS
Program Manager
Cancer Neurocognitive Translational Research Laboratory

Department of Psychology
University of Notre Dame
http://www.nd.edu

Mobile: (817) 690-2684
*Office:  (574) 631-6931*
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E-mail: mcloud at nd.edu

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On Fri, Dec 5, 2014 at 10:48 AM, Venkata Naga Pradeep Ambati <
vambati at unomaha.edu> wrote:

>  Dear HOMER Users,
>
> Please take a look at my questions and help me resolve this issues. My raw
> data file from HITACHI ETG-4000 has around 5000 to 6000 data points in the
> time series. I converted it into .fNIRS format for further processing.
> However I am not able to configure the processing option file (*.cfg) or
> use the processing option files used for the examples.
>
>
>  At the moment I am trying to play with these *.cfg files provided in
> the sample files on HOMER 2 website before actually configuring them to
> process my data. I started by using the simplest *.cfg file from example 1
> which only has band pass filters and OD to Conc conversion. Although I do
> not get any error messages when I use this file to process my data, I am
> also not seeing any processed data. When I click on OD and Conc, I see
> nothing in the data window. I see a similar response when I used .cfg file
> from example 5. There was no error message when I used this file as well.
>
>
>  I then used .cfg files from example 4 to see what it does to my data and
> I get the following error message in the command window.
>
>
>  ??? Error using ==> svd
> Input to SVD must not contain NaN or Inf.
>
> Error in ==> enPCAFilter at 82
>         [V,St,foo] = svd(c);
>
> Error in ==> EasyNIRS_Process at 88
>         eval( fcall );
>
> Error in ==> EasyNIRS>runNIRSsignalProcess at 1022
> [procResult procInput err] = EasyNIRS_Process(hmr);
>
> Error in ==> EasyNIRS>popupmenuNIRSsignalProcess_Callback at 1435
>         runNIRSsignalProcess(iGrp,iSubj,iRun,handles);
>
> Error in ==> gui_mainfcn at 96
>         feval(varargin{:});
>
> Error in ==> EasyNIRS at 43
>     gui_mainfcn(gui_State, varargin{:});
>
> Error in ==>
>
> @(hObject,eventdata)EasyNIRS('popupmenuNIRSsignalProcess_Callback',hObject,eventdata,guidata(hObject))
>
>
> ??? Error while evaluating uicontrol Callback
>
>
>  I apologize for the long email. I'd appreciate any feedback you can give
> me. Before configuring these .cfg files I would like to see what the
> example files do to my data. For some reason they are not even filtering or
> giving me OD for my data files.
>
> Thanks,
>
> Sincerely,
>  V.N.Pradeep Ambati, PhD
> Post-Doc, School of Health Physical Education and Recreation
> Biomechanics Research Building
> 6160 University Drive
> Omaha, NE 68182-0860
>
> University of Nebraska at Omaha
> Mob: 804-402-0415
> email: vambati at unomaha.edu
> coe.unomaha.edu/biomechanics
> [image: cid:2AD8C849-75A3-43F5-9CEE-F033CF946A16 at brf.unomaha.edu]
>
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