get_ref_scores

Create reference scores of same writer and different writer scores from a
dataframe of cluster fill rates.

Perform forensic handwriting analysis of two scanned handwritten documents. This package implements the statistical method described by Madeline Johnson and Danica Ommen (2021) <doi:10.1002/sam.11566>. Similarity measures and a random forest produce a score-based likelihood ratio that quantifies the strength of the evidence in favor of the documents being written by the same writer or different writers.

Stephanie Reinders

handwriterRF

Handwriting Analysis with Random Forests

Iowa State University of Science and Technology on behalf of its Center for Statistics and Applications in Forensic Evidence 

get_ref_scores function

<dl><dt>rforest</dt>
<dd>A ranger random forest created with
<code>train_rf</code>.</dd>
<dt>df</dt>
<dd>A dataframe of cluster fill rates created with
<code>get_cluster_fill_rates</code> with an added writer ID column.</dd>
<dt>seed</dt>
<dd>Optional. An integer to set the seed for the random number
generator to make the results reproducible.</dd>
<dt>downsample_diff_pairs</dt>
<dd>If TRUE, the different writer pairs are
down-sampled to equal the number of same writer pairs. If FALSE, all
different writer pairs are used.</dd></dl>

Arguments

Get Reference Scores — get_ref_scores

<dl>

<dt>rforest</dt>
<dd>A ranger random forest created with
<code>train_rf</code>.</dd>


<dt>df</dt>
<dd>A dataframe of cluster fill rates created with
<code>get_cluster_fill_rates</code> with an added writer ID column.</dd>


<dt>seed</dt>
<dd>Optional. An integer to set the seed for the random number
generator to make the results reproducible.</dd>


<dt>downsample_diff_pairs</dt>
<dd>If TRUE, the different writer pairs are
down-sampled to equal the number of same writer pairs. If FALSE, all
different writer pairs are used.</dd>

</dl>

get_ref_scores: Get Reference Scores

Description

Usage

Value

Arguments

Examples