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 — reference:ft_statfun_indepsampleszcoh [2018/08/23 14:43] (current) Line 1: Line 1: + =====  FT_STATFUN_INDEPSAMPLESZCOH ===== + + Note that this reference documentation is identical to the help that is displayed in MATLAB when you type "help ft_statfun_indepsamplesZcoh"​. + + <​html><​pre>​ + FT_STATFUN_INDEPSAMPLESCOHZ calculates the independent samples coherence + Z-statistic on the biological data in dat (the dependent variable), using the + information on the independent variable (ivar) in design. + + Use this function by calling one of the high-level statistics functions as + [stat] = ft_timelockstatistics(cfg,​ timelock1, timelock2, ...) + [stat] = ft_freqstatistics(cfg,​ freq1, freq2, ...) + [stat] = ft_sourcestatistics(cfg,​ source1, source2, ...) + with the following configuration option + cfg.statistic = '​ft_statfun_indepsamplesZcoh'​ + + The samples-dimension of the dat-variable must be the result of a reshaping + operation applied to a data structure with dimord chan_(freq_time) or + pos_(freq_time). The configuration must contain channel labels in cfg.label or + position information in cfg.pos. This information is used to determine the number + of channels. The dimord of the output fields is [prod(nchancmb,​nfreq,​ntime),​1]. The + channel combinations are the elements of the lower diagonal of the cross-spectral + density matrix. + + Configuration options + cfg.computestat ​   = '​yes'​ or '​no',​ calculate the statistic (default='​yes'​) + cfg.computecritval = '​yes'​ or '​no',​ calculate the critical values of the test statistics (default='​no'​) + cfg.computeprob ​   = '​yes'​ or '​no',​ calculate the p-values (default='​no'​) + + The following options are relevant if cfg.computecritval='​yes'​ and/or + cfg.computeprob='​yes'​. + cfg.alpha = critical alpha-level of the statistical test (default=0.05) + cfg.tail ​ = -1, 0, or 1, left, two-sided, or right (default=1) + cfg.tail in combination with cfg.computecritval='​yes'​ + determines whether the critical value is computed at + quantile cfg.alpha (with cfg.tail=-1),​ at quantiles + cfg.alpha/2 and (1-cfg.alpha/​2) (with cfg.tail=0),​ or at + quantile (1-cfg.alpha) (with cfg.tail=1). + + Design specification + cfg.ivar ​ = column number of the design that contains the labels of the conditions that + must be compared (default=1). The labels are the numbers 1 and 2. + + See also <​font color=green>​FT_TIMELOCKSTATISTICS,​ <​font color=green>​FT_FREQSTATISTICS​ or <​font color=green>​FT_SOURCESTATISTICS​ +