permutation test for more than 2 conditions

[Andrew Smart]

Hi,
I would like to test for a main effect using the cluster-based permutation test (a one-way ANOVA?)

I have set up the design matrix as follows:

subj=16;
design=zeros(2,3*subj);
for i=1:subj
    design(1,i)=i;
end
for i=1:subj
    design(1,subj+i)=i;
end
for i=1:subj
    design(1,subj*2+i)=i;
end
design(2,1:subj)=1;
design(2,subj+1:2*subj)=2;
design(2,subj*2+1:3*subj)=3;

cfg.design = design;
cfg.uvar=1;
cfg.ivar=2;


and the cfg has

cfg.statistic = 'depsamplesF';
cfg.tail=1;
cfg.alpha = 0.05;
cfg.numrandomization = 500;

The following error comes up in statfun_depsamplesF:
Undefined function or method 'finv' for input arguments of type 'double'.
from these lines:
if cfg.tail==1
    s.critval = ((nunits-1).*ncontrasts./(nunits-ncontrasts)).*finv(1-cfg.alpha,s.dfnum,s.dfdenom);
  end;

And then it crashes because it cannot determine the parametric critical value for clustering. What 
is "finv"?

Thank you for any help,
andy

----------------------------------
The aim of this list is to facilitate the discussion between users of the FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis. See also http://listserv.surfnet.nl/archives/fieldtrip.html and http://www.ru.nl/fcdonders/fieldtrip.