data_to_stslist

stslist_to_data

Transform TraMineR's state sequence object to data.table and vice versa

Designed for estimating variants of hidden (latent) Markov models
(HMMs), mixture HMMs, and non-homogeneous HMMs (NHMMs) for social sequence
data and other categorical time series. Special cases include
feedback-augmented NHMMs, Markov models without latent layer, mixture
Markov models, and latent class models. The package supports models for one
or multiple subjects with one or multiple parallel sequences (channels).
External covariates can be added to explain cluster membership in mixture
models as well as initial, transition and emission probabilities in NHMMs.
The package provides functions for evaluating and comparing models, as well
as functions for visualizing of multichannel sequence data and HMMs. For
NHMMs, methods for computing average causal effects and marginal state and
emission probabilities are available. Models are estimated using maximum
likelihood via the EM algorithm or direct numerical maximization with
analytical gradients. Documentation is available via several vignettes,
and Helske and Helske (2019, <doi:10.18637/jss.v088.i03>). For methodology
behind the NHMMs, see Helske (2025, <doi:10.48550/arXiv.2503.16014>).

Jouni Helske

seqHMM

Mixture Hidden Markov Models for Social Sequence Data and Other
Multivariate, Multichannel Categorical Time Series

Satu Helske

data_to_stslist function

<dl><dt>x</dt>
<dd>For <code>data_to_stslist</code>, a <code>data.frame</code> type of object in long format,
or a model object of class <code>nhmm</code> or <code>mnhmm</code>.
For <code>stslist_to_data</code>, an object of class <code>stslist</code> or list of such objects.</dd>
<dt>id</dt>
<dd>A character string specifying the id variable. Ignored if <code>x</code>
is NHMM.</dd>
<dt>time</dt>
<dd>A character string specifying the time variable. Ignored if <code>x</code>
is NHMM.</dd>
<dt>responses</dt>
<dd>A character vector specifying the name(s) of the response
variable(s). Ignored if <code>x</code> is NHMM.</dd>
<dt>seqdef_args</dt>
<dd>A list of additional arguments to <code>TraMineR::seqdef()</code> in
case of <code>data_to_stslist</code>. In case of <code>length(responses) &gt; 1</code>, a list of
lists. Ignored in <code>stslist_to_data</code>.</dd>
<dt>...</dt>
<dd>Ignored</dd></dl>

Arguments

Transform TraMineR's state sequence object to data.table and vice versa — data_to_stslist

<dl>

<dt>x</dt>
<dd>For <code>data_to_stslist</code>, a <code>data.frame</code> type of object in long format,
or a model object of class <code>nhmm</code> or <code>mnhmm</code>.
For <code>stslist_to_data</code>, an object of class <code>stslist</code> or list of such objects.</dd>


<dt>id</dt>
<dd>A character string specifying the id variable. Ignored if <code>x</code>
is NHMM.</dd>


<dt>time</dt>
<dd>A character string specifying the time variable. Ignored if <code>x</code>
is NHMM.</dd>


<dt>responses</dt>
<dd>A character vector specifying the name(s) of the response
variable(s). Ignored if <code>x</code> is NHMM.</dd>


<dt>seqdef_args</dt>
<dd>A list of additional arguments to <code>TraMineR::seqdef()</code> in
case of <code>data_to_stslist</code>. In case of <code>length(responses) &gt; 1</code>, a list of
lists. Ignored in <code>stslist_to_data</code>.</dd>


<dt>...</dt>
<dd>Ignored</dd>

</dl>

data_to_stslist: Transform TraMineR's state sequence object to data.table and vice versa

Description

Usage

Arguments