[Eeglablist] Reading Neuroscan locations file
Arnaud Delorme
arno at ucsd.edu
Thu Jul 5 22:19:33 PDT 2012
Dear Yannis,
> First, one quick question: Is there a way to search the EEGLAB list with key terms? At the moment I can only see how to browse complete past archives.
Yes, on the main EEGLAB page, there is a google custom search for the list
http://sccn.ucsd.edu/eeglab/
> Second, the longer question: I use a Neuroscan quik-cap 64-channel with synamps-1, with 8 additional electrodes (total 72) and I am having problems reading channel locations.
There was a problem with the function. Use this updated function instead (it is going to be in the future release). Overwrite the one in EEGLAB (subfolder functions/sigprocfunc). I was able to read and plot your channel locations with that function.
https://sccn.ucsd.edu/svn/software/eeglab/functions/sigprocfunc/readneurolocs.m
Best regards,
Arno
>
> From the neuroscan software I can save the .asc file with channel positions that I provide at the end of this email (see at the bottom of the email). However, when I try to read it using the GUI Edit channel Info>Read Locations, I get the error I also provide below.
>
> Question 1: Is there a way I can read this location file?
> Question 2: If not, for 62 of the standard cap electrodes I could get the standard locations. For some of the additional electrodes (numbers 31-32, 65-72), I suppose if I change their names to standard names, their locations could be read from a standard file? I suppose 32 and 69-71 must have standard locations/names; 65-68 are attached at the internal and the external canthus of each eye to obtain horizontal ocular movements)
> Question 3: Two electrodes (31 (the third bipolar cap electrode) and 72 are left free to record power line noise). As these electrodes do not have a standard location (they are attached over the central/frontal part of the cap) and are not useful for standard purposes I will just remove them (unless someone suggests it would be useful to include them in ICA even though they do not have a fixed location?)
>
> Many thanks for any help you could provide!
>
> Best wishes,
> Yannis
>
>
>
>
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> %% The error message when trying to read the locations file (see below for the locations file)
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
>
> IMPORTANT: After importing/modifying data channels, you must close
> the channel editing window for the changes to take effect in EEGLAB.
> TIP: Call this function directy from the prompt, ">> pop_chanedit([]);"
> to convert between channel location file formats
> readlocs(): 'asc' format assumed from file extension
> Reading file (lines): 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 224
> ??? Error using ==> readlocs>load_file_or_array at 624
> readlocs(): cannot find the named file or variable, check syntax
>
> Error in ==> readlocs at 405
> array = load_file_or_array( filename, g.skiplines);
>
> Error in ==> readneurolocs at 55
> chanlocs = readlocs('128.DAT', 'filetype', 'custom', 'format', { 'labels' 'ignore' '-Y' 'X' 'Z' });
>
> Error in ==> readlocs at 361
> eloc = readneurolocs( filename );
>
> Error in ==> pop_chanedit at 664
> [chans] = readlocs(tmpargs{:});
>
> ??? Error using ==> waitfor
> Error while evaluating uicontrol Callback
>
>
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> %% The locations file from Neuroscan
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
>
> ;SCAN 4.0 ASCII Channel Description File
> ;
> ;Line format:
> ;#<channel number> <label>
> ;or:
> ;<display page> <channel number> <pos x0> <pos y0> <pos x1> <pos y1>
> ;
> ;A semicolon at the first column indicates a comment.
> ;
> #1 O2
> #2 O1
> #3 OZ
> #4 PZ
> #5 P4
> #6 CP4
> #7 P8
> #8 C4
> #9 TP8
> #10 T8
> #11 P7
> #12 P3
> #13 CP3
> #14 CPZ
> #15 CZ
> #16 FC4
> #17 FT8
> #18 TP7
> #19 C3
> #20 FCZ
> #21 FZ
> #22 F4
> #23 F8
> #24 T7
> #25 FT7
> #26 FC3
> #27 F3
> #28 FP2
> #29 F7
> #30 FP1
> #31 LineNoise
> #32 VEOG
> #33 PO5
> #34 PO3
> #35 P1
> #36 POZ
> #37 P2
> #38 PO4
> #39 CP2
> #40 P6
> #41 PO6
> #42 CP6
> #43 C6
> #44 PO8
> #45 PO7
> #46 P5
> #47 CP5
> #48 CP1
> #49 C1
> #50 C2
> #51 FC2
> #52 FC6
> #53 C5
> #54 FC1
> #55 F2
> #56 F6
> #57 FC5
> #58 F1
> #59 AF4
> #60 AF8
> #61 F5
> #62 AF7
> #63 AF3
> #64 FPZ
> #65 HEOGL
> #66 HEOGR
> #67 HEOG_IL
> #68 HEOG_IR
> #69 M1
> #70 M2
> #71 Nose
> #72 50Hz
> 0 1 0.560 0.835 0.614 0.898
> 0 2 0.401 0.831 0.455 0.893
> 0 3 0.488 0.828 0.542 0.890
> 0 4 0.485 0.646 0.539 0.708
> 0 5 0.607 0.651 0.661 0.713
> 0 6 0.623 0.568 0.677 0.630
> 0 7 0.729 0.709 0.783 0.771
> 0 8 0.629 0.489 0.683 0.551
> 0 9 0.778 0.611 0.832 0.673
> 0 10 0.791 0.492 0.845 0.554
> 0 11 0.246 0.727 0.300 0.789
> 0 12 0.362 0.659 0.416 0.721
> 0 13 0.347 0.576 0.401 0.638
> 0 14 0.485 0.565 0.539 0.627
> 0 15 0.485 0.487 0.539 0.549
> 0 16 0.626 0.403 0.680 0.465
> 0 17 0.786 0.371 0.840 0.433
> 0 18 0.190 0.625 0.244 0.687
> 0 19 0.339 0.492 0.393 0.554
> 0 20 0.482 0.403 0.536 0.465
> 0 21 0.482 0.313 0.536 0.375
> 0 22 0.612 0.316 0.666 0.378
> 0 23 0.737 0.261 0.791 0.323
> 0 24 0.171 0.501 0.225 0.563
> 0 25 0.187 0.368 0.241 0.430
> 0 26 0.341 0.409 0.395 0.471
> 0 27 0.355 0.316 0.409 0.378
> 0 28 0.580 0.137 0.634 0.199
> 0 29 0.227 0.261 0.281 0.323
> 0 30 0.385 0.137 0.439 0.199
> 0 31 0.251 0.829 0.305 0.891
> 0 32 0.227 0.113 0.281 0.175
> 0 33 0.341 0.766 0.395 0.829
> 0 34 0.413 0.750 0.467 0.810
> 0 35 0.416 0.647 0.470 0.709
> 0 36 0.488 0.730 0.542 0.792
> 0 37 0.547 0.643 0.601 0.705
> 0 38 0.562 0.734 0.616 0.797
> 0 39 0.555 0.565 0.609 0.627
> 0 40 0.666 0.678 0.720 0.740
> 0 41 0.625 0.770 0.678 0.832
> 0 42 0.694 0.582 0.748 0.644
> 0 43 0.704 0.489 0.758 0.551
> 0 44 0.643 0.862 0.697 0.923
> 0 45 0.336 0.859 0.390 0.919
> 0 46 0.306 0.683 0.360 0.745
> 0 47 0.274 0.594 0.328 0.656
> 0 48 0.417 0.568 0.471 0.630
> 0 49 0.414 0.489 0.468 0.551
> 0 50 0.555 0.487 0.609 0.549
> 0 51 0.555 0.406 0.609 0.468
> 0 52 0.702 0.394 0.756 0.456
> 0 53 0.263 0.498 0.317 0.560
> 0 54 0.414 0.409 0.468 0.471
> 0 55 0.547 0.319 0.601 0.381
> 0 56 0.675 0.299 0.729 0.361
> 0 57 0.265 0.397 0.319 0.459
> 0 58 0.420 0.325 0.474 0.387
> 0 59 0.577 0.220 0.631 0.282
> 0 60 0.669 0.177 0.723 0.239
> 0 61 0.290 0.301 0.344 0.363
> 0 62 0.295 0.180 0.349 0.242
> 0 63 0.385 0.232 0.439 0.294
> 0 64 0.482 0.131 0.536 0.193
> 0 65 0.165 0.186 0.219 0.248
> 0 66 0.794 0.171 0.848 0.233
> 0 67 0.314 0.055 0.368 0.117
> 0 68 0.656 0.055 0.709 0.117
> 0 69 0.181 0.706 0.235 0.768
> 0 70 0.799 0.718 0.853 0.780
> 0 71 0.482 0.021 0.536 0.083
> 0 72 0.715 0.825 0.769 0.887
> 1 1 0.032 0.032 0.161 0.161
> 1 2 0.194 0.032 0.323 0.161
> 1 3 0.355 0.032 0.484 0.161
> 1 4 0.516 0.032 0.645 0.161
> 1 5 0.677 0.032 0.806 0.161
> 1 6 0.839 0.032 0.968 0.161
> 1 7 0.032 0.194 0.161 0.323
> 1 8 0.194 0.194 0.323 0.323
> 1 9 0.355 0.194 0.484 0.323
> 1 11 0.516 0.194 0.645 0.323
> 1 12 0.677 0.194 0.806 0.323
> 1 13 0.839 0.194 0.968 0.323
> 1 14 0.032 0.355 0.161 0.484
> 1 15 0.194 0.355 0.323 0.484
> 1 17 0.355 0.355 0.484 0.484
> 1 18 0.516 0.355 0.645 0.484
> 1 19 0.677 0.355 0.806 0.484
> 1 20 0.839 0.355 0.968 0.484
> 1 21 0.032 0.516 0.161 0.645
> 1 22 0.194 0.516 0.323 0.645
> 1 25 0.355 0.516 0.484 0.645
> 1 27 0.516 0.516 0.645 0.645
> 1 33 0.677 0.516 0.806 0.645
> 1 34 0.839 0.516 0.968 0.645
> 1 35 0.032 0.677 0.161 0.806
> 1 36 0.194 0.677 0.323 0.806
> 1 37 0.355 0.677 0.484 0.806
> 1 38 0.516 0.677 0.645 0.806
> 1 40 0.677 0.677 0.806 0.806
> 1 41 0.839 0.677 0.968 0.806
> 1 44 0.032 0.839 0.161 0.968
> 1 45 0.194 0.839 0.323 0.968
> 1 46 0.355 0.839 0.484 0.968
> 2 9 0.032 0.032 0.161 0.161
> 2 10 0.194 0.032 0.323 0.161
> 2 16 0.355 0.032 0.484 0.161
> 2 23 0.516 0.032 0.645 0.161
> 2 26 0.677 0.032 0.806 0.161
> 2 28 0.839 0.032 0.968 0.161
> 2 30 0.032 0.194 0.161 0.323
> 2 39 0.194 0.194 0.323 0.323
> 2 40 0.355 0.194 0.484 0.323
> 2 42 0.516 0.194 0.645 0.323
> 2 43 0.677 0.194 0.806 0.323
> 2 47 0.839 0.194 0.968 0.323
> 2 48 0.032 0.355 0.161 0.484
> 2 49 0.194 0.355 0.323 0.484
> 2 50 0.355 0.355 0.484 0.484
> 2 51 0.516 0.355 0.645 0.484
> 2 52 0.677 0.355 0.806 0.484
> 2 53 0.839 0.355 0.968 0.484
> 2 54 0.032 0.516 0.161 0.645
> 2 55 0.194 0.516 0.323 0.645
> 2 56 0.355 0.516 0.484 0.645
> 2 57 0.516 0.516 0.645 0.645
> 2 58 0.677 0.516 0.806 0.645
> 2 59 0.839 0.516 0.968 0.645
> 2 60 0.032 0.677 0.161 0.806
> 2 61 0.194 0.677 0.323 0.806
> 2 62 0.355 0.677 0.484 0.806
> 2 63 0.516 0.677 0.645 0.806
> 2 64 0.677 0.677 0.806 0.806
> 2 65 0.839 0.677 0.968 0.806
> 2 66 0.032 0.839 0.161 0.968
> 2 67 0.194 0.839 0.323 0.968
> 2 68 0.355 0.839 0.484 0.968
> 2 69 0.516 0.839 0.645 0.968
> 2 70 0.677 0.839 0.806 0.968
> 2 71 0.839 0.839 0.968 0.968
> 3 31 0.091 0.167 0.455 0.833
> 3 72 0.545 0.167 0.909 0.833
>
>
> --
>
> Yannis Paloyelis, PhD CPsychol
> Department of Neuroimaging
> Institute of Psychiatry (Box 089)
> King's College London
> Denmark Hill
> London SE5 8AF
> Tel. 020 32283069
> Fax 020 32282116
> Email: Yannis.Paloyelis at kcl.ac.uk
> y.paloyelis at gmail.com
>
>
>
>
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