GLOBTEST performs different global tests. A global test provides one joint statement on all endpoints, i.e. the global hypotheses is testing. This function returns the corresponding p-value. ---------- INPUT These input arguments are required: Input: data matrix with the size [n,k] n1: number of patients in group one (0 < n1 <= n ), restricted by the kind of samp samp: kind of sample single sample 'single' (n1 = n) paired sample 'paired' (n1 = n/2; n must be even) independent sample 'indept' (n1 < n) ----- [...] = globtest(...,'PARAM1',VAL1,'PARAM2',VAL2,...) specifies additional parameters and their values. Valid parameters are the following: Parameter Value 'tail' The alternative hypothesis against which to compute p-values for testing the hypothesis of no differences. Choices are: tail Alternative Hypothesis '~=' (the default) "there is a significant difference" (two-sided test) '>' "the values of group 1 are higher than the values of group 2" (one-sided test) '<' "the values of group 1 are smaller than the values of group 2" (one-sided test) 'B' number of permutations default: 500 B must be in the intervall 500 <= B <= 2^n1 for single and paired sample (for 2^n1 < 500 : B = min(B,2^n1)) 500 <= B <= n! / n1!*(n-1) for independent sample (for n! / n1!*(n-n1)! < 500 : B = min(B,n!/n1!*(n-n1)!)) --- 'tstat' teststatistic 'tmax' => is sensitive to departures in only a few endpoints 'tsum' => is sensitive to departures of all endpoints in the same direction 'tsumabs' (the default) => is sensitive to departures of all endpoints (independent of the direction); only two-sided!!! 'ta' => choose this test statistic if the relative number of false hypotheses is small; only independent! ----------- OUTPUT [p] = globtest(Input,n1,samp) returns the p-value of the global test. ----------- REFERENCES: [1] Hemmelmann C, Horn M, Reiterer S, Schack B, Suesse T, Weiss S. Multivariate tests for the evaluation of high-dimensional EEG data. J Neurosci Methods. 2004 Oct 15;139(1):111-20. Copyright (C) 2006,2007 Claudia Hemmelmann <claudia.hemmelmann@mti.uni-jena.de> Adapted by A Schloegl <a.schloegl@ieee.org> 2006,2007 *** This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either Version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. --------------------------------------------------------------------------

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