[FieldTrip] resend: missing cfg.bandwidth field

[jan-mathijs schoffelen]

Hi Karl,

Just check the original paper: the bandwidth is a required parameter for the thing to be computed in the first place, because the metric is computed by integrating over a specified frequency band. You as a user should specify it; and even more so, the value is up to you ;-).

JM

On Jun 26, 2012, at 7:36 PM, Karl Doron wrote:

> Hello,
> 
> Apologies for the double email. I sent the previous one without finishing.
> 
> I'm trying to use ft_connectivityanalysis with the phase slope index method. There is an error in ft_connectivityanalysis because the field "bandwidth" is missing. I don't find the bandwidth field to be output in any of the ft_freqanalysis functions. Is it simply the foi/some smoothing amount? 
> 
> cfg                     = [];
> cfg.method         = 'psi';
> psi                     = ft_connectivityanalysis(cfg, freq);
> 
> selection fourierspctrm along dimension 2
> averaging crsspctrm over rpt
> removing dimension rpt from crsspctrm
> Reference to non-existent field 'bandwidth'.
> 
> Error in ft_connectivityanalysis (line 719)
>     nbin   = nearest(data.freq, data.freq(1)+cfg.bandwidth)-1;
> 
> 
> freq was computed with the following:
> 
> cfg            = [];
> cfg.channel    = chans; %{'MEG', '-A41','-A71'};
> cfg.channelcmb = chancmb;
> cfg.method     = 'mtmconvol';
> cfg.output     = 'fourier';
> cfg.keeptrials = 'yes';
> cfg.foi        = band(1):band(2); %8:12Hz
> cfg.toi        = 1.8:0.01:3.0;
> cfg.t_ftimwin  = 5./cfg.foi;
> cfg.taper      = 'hanning';
>  
> freq           = ft_freqanalysis(cfg, data);
> 
> 
> 
> Thanks you,
> 
> Karl Doron, phd
> UC, Santa Barbara
> 
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Jan-Mathijs Schoffelen, MD PhD 

Donders Institute for Brain, Cognition and Behaviour, 
Centre for Cognitive Neuroimaging,
Radboud University Nijmegen, The Netherlands

Max Planck Institute for Psycholinguistics,
Nijmegen, The Netherlands

J.Schoffelen at donders.ru.nl
Telephone: +31-24-3614793

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