error using freqanalysis_mtmfft

[Frederic Roux]

Hi everyone,
 
I am using freqanalysis with the following cfg structure
 
cfg             = [];
cfg.output      = 'pow';
cfg.channel     = {'MEG'};
cfg.method      = 'mtmfft';
cfg.taper       = 'dpss';
cfg.foi         = 1:200; 
cfg.t_ftimwin   = .5*ones(1,length(cfg.foi));
cfg.toi         = [-1.5:.5:2.5]; 
cfg.tapsmofrq   = 5.*ones(1,length(cfg.foi)); 
cfg.pad         = 'maxperlen';
 
and I get the following error message
 
??? Error using ==> dpss
The Time-bandwidth product NW must be a scalar.
 
Error in ==> freqanalysis_mtmfft>double_dpss at 594
tap = dpss(double(a), double(b), varargin{:});
 
Error in ==> freqanalysis_mtmfft at 421
    tap =
double_dpss(numdatbns,numdatbns*(cfg.tapsmofrq./data.fsample))';
 
Error in ==> freqanalysis at 192


K should be equal to 2*(.5*5)-1 = 4 tapers so I don't really understand what's going wrong here.
And before diving into the code I thought that maybe someone could provide me with a simple answer/solution. 
Any help with this would be greatly apreciated!
 
Frederic
  		 	   		  
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