letter.convert

Converts and unifies most hexadecimal and some HTML coded letters to Unicode characters. Performs CERMINE specific error correction (inserting operators, where these got lost while conversion).

Provides a function collection to extract metadata, sectioned text and study characteristics from scientific articles in 'NISO-JATS' format. Articles in PDF format can be converted to 'NISO-JATS' with the 'Content ExtRactor and MINEr' ('CERMINE', <https://github.com/CeON/CERMINE>). For convenience, two functions bundle the extraction heuristics: JATSdecoder() converts 'NISO-JATS'-tagged XML files to a structured list with elements title, author, journal, history, 'DOI', abstract, sectioned text and reference list. study.character() extracts multiple study characteristics like number of included studies, statistical methods used, alpha error, power, statistical results, correction method for multiple testing, software used. An estimation of the involved sample size is performed based on reports within the abstract and the reported degrees of freedom within statistical results. In addition, the package contains some useful functions to process text (text2sentences(), text2num(), ngram(), strsplit2(), grep2()). See Böschen, I. (2021) <doi:10.1007/s11192-021-04162-z> Böschen, I. (2021) <doi:10.1038/s41598-021-98782-3> and Böschen, I (2023) <doi:10.1038/s41598-022-27085-y>.

Ingmar Böschen

JATSdecoder

A Metadata and Text Extraction and Manipulation Tool Set

letter.convert function

<dl><dt>x</dt>
<dd>text string to process.</dd>
<dt>cermine</dt>
<dd>Logical. If TRUE CERMINE specific error handling and letter conversion will be applied.</dd>
<dt>greek2text</dt>
<dd>Logical. If TRUE some greek letters and special characters will be unified to textual representation (important to extract stats).</dd>
<dt>warning</dt>
<dd>Logical. If TRUE prints warning massage if CERMINE specific letter conversion was performed.</dd></dl>

Arguments

letter.convert — letter.convert

<dl>

<dt>x</dt>
<dd>text string to process.</dd>


<dt>cermine</dt>
<dd>Logical. If TRUE CERMINE specific error handling and letter conversion will be applied.</dd>


<dt>greek2text</dt>
<dd>Logical. If TRUE some greek letters and special characters will be unified to textual representation (important to extract stats).</dd>


<dt>warning</dt>
<dd>Logical. If TRUE prints warning massage if CERMINE specific letter conversion was performed.</dd>

</dl>

letter.convert: letter.convert

Description

Usage

Value

Arguments

Examples