[FieldTrip] Extracting the time of a cluster

Mads Jensen mje.mads at gmail.com
Thu Jun 6 12:48:02 CEST 2013

Hi Jörn,

thanks for the swift and very useful reply.


On 06/06/13 10:17, "Jörn M. Horschig" wrote:
> Hi Mads,
> there is a stats.posclusterlabelmat and stats.negclusterlabelmat field,
> which contain the indices of all your clusters. You can use these
> indices and to index the period where your test shows some significant
> effect(e.g. for timelock.avg or timelock.time). See here for an example,
> which does not quite do what you want, but gets close
> http://fieldtrip.fcdonders.nl/tutorial/cluster_permutation_timelock#plotting_the_results
> And, yes, cirange defines the range of the confidence interval for that
> particular cluster, so pvalue - cirange gives the lower bound and pvalue
> + cirange the upper bound. If your upper bound extends beyond the
> critical alpha-value, I would advise to use more randomizations.
> Best,
> Jörn
> On 6/6/2013 9:16 AM, Mads Jensen wrote:
>> Dear all,
>> I have made a statistics analysis on ERP data using
>> ft_timelockstatistics and got a significant cluster I would like to
>> know the time course of this cluster(i.e. when it starts and ends
>> being significant) , is that possible?
>> I take to the cirange that is computed in the output for the cluster
>> from ft_timelockstatistics be the upper and lower limit of the
>> confidence interval, so the cluster.prop +/- the cirange gives the
>> 95%confidence intervals. Is that correct?
>> best wishes,
>> Mads
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