covmat {pomp} | R Documentation |
A helper function to extract a covariance matrix.
## S4 method for signature 'pmcmcd_pomp' covmat(object, start = 1, thin = 1, expand = 2.38, ...) ## S4 method for signature 'pmcmcList' covmat(object, start = 1, thin = 1, expand = 2.38, ...) ## S4 method for signature 'abcd_pomp' covmat(object, start = 1, thin = 1, expand = 2.38, ...) ## S4 method for signature 'abcList' covmat(object, start = 1, thin = 1, expand = 2.38, ...) ## S4 method for signature 'probed_pomp' covmat(object, ...)
object |
an object extending ‘pomp’ |
start |
the first iteration number to be used in estimating the covariance matrix.
Setting |
thin |
factor by which the chains are to be thinned |
expand |
the expansion factor |
... |
ignored |
When object
is the result of a pmcmc
or abc
computation,
covmat(object)
gives the covariance matrix of the chains.
This can be useful, for example, in tuning the proposal distribution.
When object
is a ‘probed_pomp’ object (i.e., the result
of a probe
computation), covmat(object)
returns the
covariance matrix of the probes, as applied to simulated data.