Visual representation foehnix model optimization.
# S3 method for foehnix
plot(x, which = NULL, log = TRUE, ..., ask = TRUE)a foehnix mixture model object.
NULL (default), character, character string,
integer, or numeric. Allowed characters: loglik (1),
loglikcontribution (2), coef (3),
hist (4), and posterior (5).
logical, if TRUE the x-axis for loglik, loglikcontribution
and coef is shown on the log scale.
additional arguments, unused.
boolean, default is TRUE. User will be asked to show the
next figure if multiple figures are requested. Can be set to FALSE
to overwrite the default.
There are currently three different plot types.
"loglik" shows the log-likelihood sum path trough
the iterations of the EM algorithm for parameter estimation.
"loglikcontribution" shows the log-likelihood
contribution (initial value subtracted; all paths start
with 0).
coef shows the development of the (standardized)
coefficients during EM optimization. Parameters of the
components are shown on the real scale, the coefficients
of the concomitant model (if used) are shown on the
standardized scale.
hist plots empirical histograms of the main variable
for the two clusters (split at posterior probability >= 0.5).
In addition, the estimated parametric clusters are shown.
posterior creates a histogram of the posterior probabilities.
point masses at 0.0 and 1.0 indicate sharp separation
of the clusters (posterior probabilities close to 0 or 1).
The two additional input arguments breaks (numeric vector)
and freq (logical) will be forwarded to hist(...).