Page History

An overview of computational analysis of text, foundations, and exploration of challenges and strategies.

Table of Contents

Prep

bring Bring text to play with in Voyant. Input format can be plain text, a PDF (with OCR), a MS Word Document or a URL for HTML analysis.

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Sample texts, courtesy of Project Gutenberg. Use the plain text version.
- Crane, Stephen, 1871-1900. The Red Badge of Courage: An Episode of the American Civil War.
- Dickens, Charles, 1812-1870. A Tale of Two Cities.
- Upham, Charles Wentworth, 1802-1875. Salem Witchcraft, Volumes I and II
Sample URLS: copy and paste into the Voyant upload browser window to get started.Sample URLS: copy and paste into the Voyant upload browser window to get started.
- Economics of Crisis - http://www.economicsofcrisis.com/indications.html
- Instructions to major John Sullivan. Washington, George, 1732-1799. The writings of George Washington from the original manuscript sources. Electronic Text Center, University of Virginia Library
- Copyright Law of the United States of America and Related Laws Contained in Title 17 of the United States Code - http://www.copyright.gov/title17/92preface.html
Sample visualization: Dr. Martin Luther King, Jr. I Have a Dream speech.

We calculate frequency

We can express our counts simply (as counts), or we can express them as frequencies. Why calculate frequencies?
Is either representation misleading? If so, in what ways?

(1) Visualization of derived data

(2) Exerting control

(3) General questions

What does exerting control do to our results? Does it change the validity of our assertions?
What is signal? What is noise?

(2) Visualization of derived data

We calculate frequency

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