permutationTest

The difference between mean <code>scores</code> from model 1 and
 mean <code>scores</code> from model 2 is used as the test statistic.
 Under the null hypothesis of no difference, the actually observed
 difference between mean scores should not be notably different from
 the distribution of the test statistic under permutation.
 As the computation of all possible permutations is only feasible for
 small datasets, a random sample of permutations is used to obtain the
 null distribution. The resulting p-value thus depends on the
 <code><a href="/link/.Random.seed?package=surveillance&version=1.20.3" data-mini-rdoc="surveillance::.Random.seed">.Random.seed</a></code>.

htest

Statistical methods for the modeling and monitoring of time series
of counts, proportions and categorical data, as well as for the modeling
of continuous-time point processes of epidemic phenomena.
The monitoring methods focus on aberration detection in count data time
series from public health surveillance of communicable diseases, but
applications could just as well originate from environmetrics,
reliability engineering, econometrics, or social sciences. The package
implements many typical outbreak detection procedures such as the
(improved) Farrington algorithm, or the negative binomial GLR-CUSUM
method of Hoehle and Paul (2008) <doi:10.1016/j.csda.2008.02.015>.
A novel CUSUM approach combining logistic and multinomial logistic
modeling is also included. The package contains several real-world data
sets, the ability to simulate outbreak data, and to visualize the
results of the monitoring in a temporal, spatial or spatio-temporal
fashion. A recent overview of the available monitoring procedures is
given by Salmon et al. (2016) <doi:10.18637/jss.v070.i10>.
For the retrospective analysis of epidemic spread, the package provides
three endemic-epidemic modeling frameworks with tools for visualization,
likelihood inference, and simulation. hhh4() estimates models for
(multivariate) count time series following Paul and Held (2011)
<doi:10.1002/sim.4177> and Meyer and Held (2014) <doi:10.1214/14-AOAS743>.
twinSIR() models the susceptible-infectious-recovered (SIR) event
history of a fixed population, e.g, epidemics across farms or networks,
as a multivariate point process as proposed by Hoehle (2009)
<doi:10.1002/bimj.200900050>. twinstim() estimates self-exciting point
process models for a spatio-temporal point pattern of infective events,
e.g., time-stamped geo-referenced surveillance data, as proposed by
Meyer et al. (2012) <doi:10.1111/j.1541-0420.2011.01684.x>.
A recent overview of the implemented space-time modeling frameworks
for epidemic phenomena is given by Meyer et al. (2017)
<doi:10.18637/jss.v077.i11>.

Sebastian Meyer

surveillance

Temporal and Spatio-Temporal Modeling and Monitoring of Epidemic
Phenomena

Andrea Riebler

Daniel Sabanes Bove

Stefan Steiner

Mikko Virtanen

Wei Wei

Valentin Wimmer

R Core Team 

Howard Burkom

Thais Correa

Mathias Hofmann

Christian Lang

Juliane Manitz

Dirk Schumacher

Leonhard Held

Michael Hoehle

Michaela Paul

Maelle Salmon

permutationTest function

<dl> <dt>score1, score2</dt>
<dd>numeric vectors of scores from models 1 and 2, respectively.</dd> <dt>nPermutation</dt>
<dd>number of Monte Carlo replicates.</dd> <dt>plot</dt>
<dd>logical indicating if a <code>truehist</code> of the <code>nPermutation</code>
 permutation test statistics should be plotted with a vertical line
 marking the observed difference of the means.
 To customize the histogram, <code>plot</code> can also be a list of
 arguments for <code>truehist</code> replacing internal defaults.</dd> <dt>verbose</dt>
<dd>logical indicating if the results should be printed in one line.</dd></dl>

Arguments

Michaela Paul with contributions by Sebastian Meyer

Author

The difference between mean <code>scores</code> from model 1 and
 mean <code>scores</code> from model 2 is used as the test statistic.
 Under the null hypothesis of no difference, the actually observed
 difference between mean scores should not be notably different from
 the distribution of the test statistic under permutation.
 As the computation of all possible permutations is only feasible for
 small datasets, a random sample of permutations is used to obtain the
 null distribution. The resulting p-value thus depends on the
 <code><a href='https://rdrr.io/r/base/Random.html'>.Random.seed</a></code>.

Monte Carlo Permutation Test for Paired Individual Scores — permutationTest

<dl>

 <dt>score1, score2</dt>
<dd>numeric vectors of scores from models 1 and 2, respectively.</dd>

 <dt>nPermutation</dt>
<dd>number of Monte Carlo replicates.</dd>

 <dt>plot</dt>
<dd>logical indicating if a <code>truehist</code> of the <code>nPermutation</code>
 permutation test statistics should be plotted with a vertical line
 marking the observed difference of the means.
 To customize the histogram, <code>plot</code> can also be a list of
 arguments for <code>truehist</code> replacing internal defaults.</dd>

 <dt>verbose</dt>
<dd>logical indicating if the results should be printed in one line.</dd>

</dl>

Monte Carlo Permutation Test for Paired Individual Scores

permutationTest: Monte Carlo Permutation Test for Paired Individual Scores

Description

Usage

Value

Arguments

Author

Details

References

See Also

Examples