The flexmix Package - NexTag Supports Open Source Initiatives

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36 refit-methods Arguments object newdata unscaled An object of class "flexmix" or "FLXdist". Data frame or list containing new data. If missing the posteriors of the original observations are returned. ... Currently not used. Author(s) Friedrich Leisch and Bettina Gruen Logical, if TRUE the component-specific likelihoods are returned. refit-methods Refit a Fitted Model Description Refits an estimated flexmix model to obtain additional information like coefficient significance p- values for GLM regression. Usage ## S4 method for signature 'flexmix, ANY': refit(object, newdata, method = c("optim", "mstep"), ...) ## S4 method for signature 'FLXRoptim': summary(object, model = 1, which = c("model", "concomitant"), ...) ## S4 method for signature 'FLXRmstep': summary(object, model = 1, which = c("model", "concomitant"), ...) ## S4 method for signature 'FLXRoptim, missing': plot(x, y, model = 1, which = c("model", "concomitant"), bycluster=TRUE, alpha=0.05, components, labels=NULL, significance = FALSE, xlab = NULL, ylab = NULL, ci = TRUE, scales = list(), as.table = TRUE, horizontal = TRUE, ...) Arguments object newdata method model An object of class "flexmix" Optional new data. Specifies if the variance covariance matrix is determined using optim or if the posteriors are assumed as given and an M-step is performed. The model (for a multivariate response) that shall be used.
efit-methods 37 which x y bycluster alpha components labels Specifies if a component specific model or the concomitant variable model is used. An object of class "FLXRoptim" Missing object. A logical if the parameters should be group by cluster or by variable. Numeric indicating the significance level. Numeric vector specifying which components are plotted. The default is to plot all components. Character vector specifying the variable names used. significance A logical indicating if non-significant coefficients are shaded in a lighter grey. xlab ylab ci Details scales as.table horizontal String for the x-axis label. String for the y-axis label. A logical indicating if significant and insignificant parameter estimates are shaded differently. ... Currently not used See argument of the same name for function xyplot. See arguments of the same name for function xyplot. See arguments of the same name for function xyplot. The refit method for FLXMRglm models in combination with the summary method can be used to obtain the usual tests for significance of coefficients. Note that the tests are valid only if flexmix returned the maximum likelihood estimator of the parameters. If refit is used with method = "mstep" for these component specific models the returned object contains a glm object for each component where the elements model which is the model frame and data which contains the original dataset are missing. Value An object inheriting form class FLXR is returned. For the method using optim the object has class FLXRoptim and for the M-step method it has class FLXRmstep. Both classes give similar results for their summary methods. Objects of class FLXRoptim have their own plot method. Lapply can be used to further analyse the refitted component specific models of objects of class FLXRmstep. Warning For method = "mstep" the standard deviations are determined separately for each of the components using the a-posteriori probabilities as weights without accounting for the fact that the components have been simultaneously estimated. The derived standard deviations are hence approximative and should only be used in an exploratory way, as they are underestimating the uncertainty given that the missing information of the component memberships are replaced by the expected values.
Page 1 and 2: The flexmix Package March 26, 2008
Page 3 and 4: BIC-methods 3 Methods object = flex
Page 5 and 6: FLXMCmvpois 5 Details The Nclus dat
Page 7 and 8: FLXP-class 7 FLXP-class Class "FLXP
Page 9 and 10: FLXP 9 FLXP Creates the concomitant
Page 11 and 12: FLXdist-class 11 Arguments object c
Page 13 and 14: FLXMRglm 13 FLXMRglm FlexMix Interf
Page 15 and 16: FLXMCmvnorm 15 Examples data("NPreg
Page 17 and 18: FLXnested-class 17 Slots fit: Funct
Page 19 and 20: KLdiv 19 KLdiv Kullback-Leibler Div
Page 21 and 22: Mehta 21 Arguments object FUN Detai
Page 23 and 24: etablocker 23 Examples data("NregFi
Page 25 and 26: candy 25 candy Candy packs purchase
Page 27 and 28: fitted-methods 27 Format Source A d
Page 29 and 30: flexmix-internal 29 Accessor Functi
Page 31 and 32: flexmix 31 Examples data("NPreg") #
Page 33 and 34: plot-methods 33 Examples data("pate
Page 35: posterior 35 Usage plotEll(object,
Page 39 and 40: seizure 39 Source Margolin, B.J., K
Page 41 and 42: stepFlexmix 41 plot(x, y, what=c("A
Page 43 and 44: trypanosome 43 Usage Format Details
Page 45 and 46: whiskey 45 Format Details Source A
Page 47 and 48: INDEX 47 cluster,FLXdist,ANY-method
Page 49: INDEX 49 posterior,FLXM,listOrdata.

The flexmix Package - NexTag Supports Open Source Initiatives

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