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.
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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!
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OUTPUT
[p] = globtest(Input,n1,samp) returns the p-value of the global test.
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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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