


Multi-taper time-frequency spectrum - point process times
Usage:
[S,f,R,Serr]=mtspectrumtrigpt(data,E,win,params,fscorr)
Input:
data (structure array of one channel of spike times; also accepts 1d column vector of spike times) -- required
E (event times) - required
win (in the form [winl winr] i.e window around each event)--
required
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) -
default 0
fscorr (finite size corrections, 0 (don't use finite size corrections) or 1 (use finite size corrections) - optional
(available only for spikes). Defaults 0.
Output:
S (triggered spectrum in form frequency x events if trialave=0; function of frequency if trialave=1)
f (frequencies)
R (spike rate)
Serr (error bars) - only for err(1)>=1

0001 function [S,f,R,Serr]=mtspectrumtrigpt(data,E,win,params,fscorr) 0002 % Multi-taper time-frequency spectrum - point process times 0003 % 0004 % Usage: 0005 % 0006 % [S,f,R,Serr]=mtspectrumtrigpt(data,E,win,params,fscorr) 0007 % Input: 0008 % data (structure array of one channel of spike times; also accepts 1d column vector of spike times) -- required 0009 % E (event times) - required 0010 % win (in the form [winl winr] i.e window around each event)-- 0011 % required 0012 % params: structure with fields tapers, pad, Fs, fpass, err, trialave 0013 % - optional 0014 % tapers (precalculated tapers from dpss, or in the form [NW K] e.g [3 5]) -- optional. If not 0015 % specified, use [NW K]=[3 5] 0016 % pad (padding factor for the FFT) - optional (can take values -1,0,1,2...). 0017 % -1 corresponds to no padding, 0 corresponds to padding 0018 % to the next highest power of 2 etc. 0019 % e.g. For N = 500, if PAD = -1, we do not pad; if PAD = 0, we pad the FFT 0020 % to 512 points, if pad=1, we pad to 1024 points etc. 0021 % Defaults to 0. 0022 % Fs (sampling frequency) - optional. Default 1. 0023 % fpass (frequency band to be used in the calculation in the form 0024 % [fmin fmax])- optional. 0025 % Default all frequencies between 0 and Fs/2 0026 % err (error calculation [1 p] - Theoretical error bars; [2 p] - Jackknife error bars 0027 % [0 p] or 0 - no error bars) - optional. Default 0. 0028 % trialave (average over events when 1, don't average when 0) - 0029 % default 0 0030 % fscorr (finite size corrections, 0 (don't use finite size corrections) or 1 (use finite size corrections) - optional 0031 % (available only for spikes). Defaults 0. 0032 % 0033 % Output: 0034 % S (triggered spectrum in form frequency x events if trialave=0; function of frequency if trialave=1) 0035 % f (frequencies) 0036 % R (spike rate) 0037 % Serr (error bars) - only for err(1)>=1 0038 0039 if nargin < 3; error('Need data, events and window parameters'); end; 0040 if nargin < 2; params=[]; end; 0041 [tapers,pad,Fs,fpass,err,trialave,params]=getparams(params); 0042 clear tapers pad Fs fpass trialave 0043 if nargin < 5 || isempty(fscorr); fscorr=0; end; 0044 if nargout > 3 && err(1)==0; error('Cannot compute errors if err(1)=0'); end; 0045 data=createdatamatpt(data,E,win); 0046 if nargout==4; 0047 [S,f,R,Serr]=mtspectrumpt(data,params,fscorr); 0048 else 0049 [S,f,R]=mtspectrumpt(data,params,fscorr); 0050 end;