tps_g

Fits a thin plate spline to a single group (one list element) in data with
<code><a href="/link/bam?package=clustra&version=0.2.1" data-mini-rdoc="clustra::bam">bam</a></code>. Uses data from only one group rather than a
zero weights approach. Zero weights would result in
incorrect crossvalidation sampling.

Clusters longitudinal trajectories over time (can be unequally
spaced, unequal length time series and/or partially overlapping series) on
a common time axis. Performs k-means clustering on a single continuous
variable measured over time, where each mean is defined by a thin plate
spline fit to all points in a cluster. Distance is MSE across trajectory
points to cluster spline. Provides graphs of derived cluster splines,
silhouette plots, and Adjusted Rand Index evaluations of the number
of clusters. Scales well to large data with multicore parallelism available
to speed computation.

George Ostrouchov

clustra

Clustering Longitudinal Trajectories

David Gagnon

Hanna Gerlovin

Chen Wei-Chen

Schmidt Drew

Oak Ridge National Laboratory 

U.S. Department of Veteran's Affairs 

tps_g function

<dl><dt>g</dt>
<dd>Integer group number.</dd>
<dt>data</dt>
<dd>A list of group-separated data using lapply with
<code>data.table::copy(data[group == g])</code> from original data in
<code>clustra</code> description.</dd>
<dt>maxdf</dt>
<dd>See <code>trajectories</code> description.</dd>
<dt>nthreads</dt>
<dd>Controls <code><a href="/link/bam?package=clustra&version=0.2.1" data-mini-rdoc="clustra::bam">bam</a></code> threads.</dd></dl>

Arguments

Fits a thin plate spline to a single group (one list element) in data with
<code><a href='https://rdrr.io/pkg/mgcv/man/bam.html'>bam</a></code>. Uses data from only one group rather than a
zero weights approach. Zero weights would result in
incorrect crossvalidation sampling.

Fits a thin plate spline to a single group with
bam. — tps_g

<dl>

<dt>g</dt>
<dd>Integer group number.</dd>


<dt>data</dt>
<dd>A list of group-separated data using lapply with
<code>data.table::copy(data[group == g])</code> from original data in
<code>clustra</code> description.</dd>


<dt>maxdf</dt>
<dd>See <code>trajectories</code> description.</dd>


<dt>nthreads</dt>
<dd>Controls <code><a href='https://rdrr.io/pkg/mgcv/man/bam.html'>bam</a></code> threads.</dd>

</dl>

tps_g: Fits a thin plate spline to a single group with `bam`.

Description

Usage

Value

Arguments