[Homer-users] Group Means Output

[Amanda Kelly]

Ahh, I see! We're using the CW6 system from TechEn, so I guess that's its
default way of doing the measurement list matrix. Thank you very much for
your help with this, I appreciate it!

-Amanda



> Hi Amanda,
>
> Ok, I see what the problem is. Your measurement list is not quite what I
> expected, because you list all of the SD pairs for wavelength 1 first, and
> then all of the SD pairs for the second wavelength. I think the order you
> put the measurement list in will depend on the NIRS instrument you are
> using- the kinds I am familiar with alternate wavelengths. The way you put
> it makes sense though, so I will update the code so it will not get
> confused by that.  For now, it should be fine to just interpret the values
> in order. I'll try to get a real fix out by the end of the week.
>
> -Katherine
>
>
>
> -------------
> Katherine Perdue, PhD
> Research Fellow in Pediatrics
> Labs of Cognitive Neuroscience
> Division of Developmental Medicine
> Boston Children's Hospital
>
> On Mar 13, 2013, at 4:36 PM, Amanda Kelly
> <adkelly at uvic.ca<mailto:adkelly at uvic.ca>>
>  wrote:
>
> Yes, I have the developer's version and I'm pretty sure it's fully
> up-to-date. I just saw that Eugenio Parise asked the same question in the
> Feb. 2013 archive and the solution was to update her program to the most
> recent version. I have just re-run CVS Update and exported the group
> results again, but still have the same labelling issue.
>
> My measurement list matrix looks good and matches the probe array we used,
> it is attached.
>
> The output labels are given as (HbO,1,2), (HbR,1,2), (HbT,1,2), (HbO,2,3),
> (HbR,2,3) ... and so on. Each of the five channels has three columns for
> the three Hb concentrations, and then that list repeats (though the
> concentration values are different).
>
> Would it be possible to simply interpret the values as though my 10
> channels were listed in order, ignoring the 1,2, 2,3, 3,5, etc. labels in
> the output?
>
> Thank you for your reply Katherine!
>
> --Amanda
>
>
> Hi Amanda,
> Are you using the developer's version of Homer? What is your measurement
> list matrix in the .nirs files? And are you saying the output labels look
> like
> (HbO,1,2), (HbO,1,2), (HbO,2,3), (HbO,2,3), etc
> or something else?
> -Katherine
> -------------
> Katherine Perdue, PhD
> Research Fellow in Pediatrics
> Labs of Cognitive Neuroscience
> Division of Developmental Medicine
> Boston Children's Hospital
> On Mar 12, 2013, at 7:15 PM, Amanda Kelly
> <adkelly at uvic.ca<mailto:adkelly at uvic.ca><mailto:adkelly at uvic.ca>>
> wrote:
> Hi everyone,
> Has anybody exported group means from Homer into a text/Excel file? I
> have
> a quick question about the format of that data.
> I understand how the file is set up, but am not sure how labels are
> assigned to the channels (i.e., source-detector pairs).
> In my output, the following 5 channels are listed: 1,2; 2,3; 3,5; 3,8;
> 4,7. Then this set is repeated again, giving a total of 10 channels. I
> assume that the first number is for a detector and the second for a
> source, since our probe array has 4 detectors and 8 sources.
> In total, our probe array has 10 channels like so. (A and B are on the
> left side of the head, C and D on the right.)
> Detector A (1): sources 1, 2
> Detector B (2): sources 2, 3, 4
> Detector C (3): sources 5, 6, 8
> Detector D (4): sources 6, 7
> Therefore, it would make sense to me that the channels would be listed
> as:
> 1,1; 1,2; 2,2; 2,3; 2,4; 3,5; 3,6; 3,8; 4,6; 4,7.
> Any ideas as to why my channels appear the way they do in the group
> means
> output? Particularly why the same 5 are given twice. In the mean
> response
> section of the file, the concentration values under identically-labelled
> cells (e.g. HbO,1,2) are not the same.
> Any/all thoughts appreciated!
> Thank you,
> Amanda<probe array.png>_______________________________________________
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