screen_topics_progress-class

<code>screen_topics_progress</code> is an S3 class designed to store data from <code>screen_topics</code>, allowing the user to re-load a previously calculated topic model. If you just want to save your decisions on article inclusion/exclusion, along with your notes, then this is probably overkill as that information can simply be exported as a .csv file.

Researchers commonly need to summarize scientific information, a process known as 'evidence synthesis'. The first stage of a synthesis process (such as a systematic review or meta-analysis) is to download a list of references from academic search engines such as 'Web of Knowledge' or 'Scopus'. The traditional approach to systematic review is then to sort these data manually, first by locating and removing duplicated entries, and then screening to remove irrelevant content by viewing titles and abstracts (in that order). 'revtools' provides interfaces for each of these tasks. An alternative approach, however, is to draw on tools from machine learning to visualise patterns in the corpus. In this case, you can use 'revtools' to render ordinations of text drawn from article titles, keywords and abstracts, and interactively select or exclude individual references, words or topics.

Martin J Westgate

revtools

Tools to Support Evidence Synthesis

screen_topics_progress-class function

Class 'screen_topics_progress' has seven slots containing the following information:<ul>
<li>raw duplicate of data passed to <code>screen_topics</code></li>
<li>stopwords vector of words excluded from the dtm</li>
<li>columns vector of column names in the original dataset</li>
<li>grouped a data.frame showing grouped data as specified by the user</li>
<li>dtm document-term matrix, created by <code>make_dtm</code></li>
<li>model most recent topic model, created by <code>run_topic_model</code></li>
<li>plot_ready data needed for the main plot (coordinates etc.)</li>
</ul>

screen_topics_progress-class: Description of class 'screen_topics_progress'

Description

Arguments

slots