
Computes component densities for observations in MVN mixture models parameterized by eigenvalue decomposition.
cdens(data, modelName, parameters, logarithm = FALSE, warn = NULL, ...)
A numeric matrix whose [i,k]
th entry is the
density or log density of observation i in component k.
The densities are not scaled by mixing proportions.
A numeric vector, matrix, or data frame of observations. Categorical variables are not allowed. If a matrix or data frame, rows correspond to observations and columns correspond to variables.
A character string indicating the model. The help file for
mclustModelNames
describes the available models.
The parameters of the model:
mean
The mean for each component. If there is more than one component, this is a matrix whose kth column is the mean of the kth component of the mixture model.
variance
A list of variance parameters for the model.
The components of this list depend on the model
specification. See the help file for mclustVariance
for details.
A logical value indicating whether or not the logarithm of the component densities should be returned. The default is to return the component densities, obtained from the log component densities by exponentiation.
A logical value indicating whether or not a warning should be issued
when computations fail. The default is warn=FALSE
.
Catches unused arguments in indirect or list calls via do.call
.
cdensE
, ...,
cdensVVV
,
dens
,
estep
,
mclustModelNames
,
mclustVariance
,
mclust.options
,
do.call
z2 <- unmap(hclass(hcVVV(faithful),2)) # initial value for 2 class case
model <- me(modelName = "EEE", data = faithful, z = z2)
cdens(modelName = "EEE", data = faithful, logarithm = TRUE,
parameters = model$parameters)[1:5,]
data(cross)
odd <- seq(1, nrow(cross), by = 2)
oddBIC <- mclustBIC(cross[odd,-1])
oddModel <- mclustModel(cross[odd,-1], oddBIC) ## best parameter estimates
names(oddModel)
even <- odd + 1
densities <- cdens(modelName = oddModel$modelName, data = cross[even,-1],
parameters = oddModel$parameters)
cbind(class = cross[even,1], densities)[1:5,]
Run the code above in your browser using DataLab