Home > eeg > egis > meg_code > rd_meg_onechan.m

rd_meg_onechan

PURPOSE ^

[analog_power,NSamp,Samp_Rate] = power_fft_analog(analog_chans,megfilename);

SYNOPSIS ^

function [big_trial,NSamp,Samp_Rate] = rd_meg_onechan(analog_chans,megfilename);

DESCRIPTION ^

[analog_power,NSamp,Samp_Rate] = power_fft_analog(analog_chans,megfilename);
 rivalry script for power (analog only)

analog chans = the analog channel numbers
meg_filename = filename of MEG data, if skipped provides a gui.

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 function [big_trial,NSamp,Samp_Rate] = rd_meg_onechan(analog_chans,megfilename);
0002 %[analog_power,NSamp,Samp_Rate] = power_fft_analog(analog_chans,megfilename);
0003 % rivalry script for power (analog only)
0004 %
0005 %analog chans = the analog channel numbers
0006 %meg_filename = filename of MEG data, if skipped provides a gui.
0007 %
0008 
0009 if nargin < 1
0010     error('what are the channels')
0011 end
0012 
0013 if nargin < 2
0014     [fid,megfilename] = get_fid('rb');
0015     fclose(fid);
0016 end;
0017 meg_fid = open_file_w_byte_order(megfilename,1);
0018 
0019 [version, NChan, NMeg, NEeg, NReference, NBad_Sensors, NTrigger, NResponse, NUtility, NAnalog, Samp_Rate, NData_Epoch, Names, NSamp, trigger, response, header_length] = rd_meg_hdr(meg_fid);
0020 
0021 [meg_indices,meg_channels, bad_sensors,eeg_indices,eeg_channels,analog_indices,analog_channels,reference_indices,reference_channels] = parse_names(Names,NMeg,NEeg,NBad_Sensors,NAnalog,NReference);
0022 
0023 numsamp = fix(NSamp/100)
0024 grabsamp = numsamp;
0025 Samp_Rate = fix(Samp_Rate);
0026 Epoch = numsamp/Samp_Rate;
0027 NSamp = 100*numsamp;
0028 big_trial = zeros(NSamp,size(analog_chans,2));
0029 grab_samp = numsamp;
0030 
0031 for itrial = 1:100
0032         trialdata = rd_meg_allch(meg_fid,header_length,NChan,grabsamp);
0033     eeg_indices = [];
0034     eeg_channels = [];
0035     trialdata_ord = fix_trial_order(trialdata,meg_channels,meg_indices,eeg_channels,eeg_indices,analog_channels,analog_indices,reference_channels,reference_indices);
0036     
0037 
0038     big_trial((itrial-1)*grabsamp+1:itrial*grabsamp,1:size(analog_chans,2)) = trialdata_ord(:,analog_chans);
0039 end;
0040 
0041 fclose('all')
0042 status = 1;
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