


Multi-taper event triggered time-frequency spectrum - continuous process
Usage:
[S,f,Serr]=mtspectrumtrigc(data,E,win,params)
Input:
Note units have to be consistent. See chronux.m for more information.
data (single channel) -- required
E (event times) -- required
win (in the form [winl winr] i.e window around each event
required)
Note that units here have
to be consistent with
units of Fs
params: structure with fields tapers, pad, Fs, fpass, err, trialave
-optional
tapers (precalculated tapers from dpss, or in the form [NW K] e.g [3 5]) -- optional. If not
specified, use [NW K]=[3 5]
pad (padding factor for the FFT) - optional (can take values -1,0,1,2...).
-1 corresponds to no padding, 0 corresponds to padding
to the next highest power of 2 etc.
e.g. For N = 500, if PAD = -1, we do not pad; if PAD = 0, we pad the FFT
to 512 points, if pad=1, we pad to 1024 points etc.
Defaults to 0.
Fs (sampling frequency) - optional. Default 1.
fpass (frequency band to be used in the calculation in the form
[fmin fmax])- optional.
Default all frequencies between 0 and Fs/2
err (error calculation [1 p] - Theoretical error bars; [2 p] - Jackknife error bars
[0 p] or 0 - no error bars) - optional. Default 0.
trialave (average over events when 1, don't average when 0) - optional. Default 0
Output:
S (triggered spectrum in form frequency x events for trialave=0 - or as a function of frequency for trialave=1)
f (frequencies)
Serr (error bars) only for err(1)>=1

0001 function [S,f,Serr]=mtspectrumtrigc(data,E,win,params) 0002 % Multi-taper event triggered time-frequency spectrum - continuous process 0003 % 0004 % Usage: 0005 % 0006 % [S,f,Serr]=mtspectrumtrigc(data,E,win,params) 0007 % Input: 0008 % Note units have to be consistent. See chronux.m for more information. 0009 % data (single channel) -- required 0010 % E (event times) -- required 0011 % win (in the form [winl winr] i.e window around each event 0012 % required) 0013 % Note that units here have 0014 % to be consistent with 0015 % units of Fs 0016 % params: structure with fields tapers, pad, Fs, fpass, err, trialave 0017 % -optional 0018 % tapers (precalculated tapers from dpss, or in the form [NW K] e.g [3 5]) -- optional. If not 0019 % specified, use [NW K]=[3 5] 0020 % pad (padding factor for the FFT) - optional (can take values -1,0,1,2...). 0021 % -1 corresponds to no padding, 0 corresponds to padding 0022 % to the next highest power of 2 etc. 0023 % e.g. For N = 500, if PAD = -1, we do not pad; if PAD = 0, we pad the FFT 0024 % to 512 points, if pad=1, we pad to 1024 points etc. 0025 % Defaults to 0. 0026 % Fs (sampling frequency) - optional. Default 1. 0027 % fpass (frequency band to be used in the calculation in the form 0028 % [fmin fmax])- optional. 0029 % Default all frequencies between 0 and Fs/2 0030 % err (error calculation [1 p] - Theoretical error bars; [2 p] - Jackknife error bars 0031 % [0 p] or 0 - no error bars) - optional. Default 0. 0032 % trialave (average over events when 1, don't average when 0) - optional. Default 0 0033 % Output: 0034 % S (triggered spectrum in form frequency x events for trialave=0 - or as a function of frequency for trialave=1) 0035 % f (frequencies) 0036 % Serr (error bars) only for err(1)>=1 0037 0038 if nargin < 3; error('Need data, events and window parameters'); end; 0039 if nargin < 4; params=[]; end; 0040 [tapers,pad,Fs,fpass,err,trialave,params]=getparams(params); 0041 clear tapers pad fpass trialave 0042 if nargout > 2 && err(1)==0; 0043 % Cannot compute error bars with err(1)=0. Change params and run again. 0044 error('When Serr is desired, err(1) has to be non-zero.'); 0045 end; 0046 data=change_row_to_column(data); 0047 data=createdatamatc(data,E,Fs,win); 0048 if nargout==3; 0049 [S,f,Serr]=mtspectrumc(data,params); 0050 else 0051 [S,f]=mtspectrumc(data,params); 0052 end;