Introduction to Sentiment Analysis in R with quanteda

ofrecido por
Coursera Project Network
En este Proyecto guiado, tú:

Run your first generic and targeted sentiment analyses using a dataset of US presidential concession speeches.

Visualize sentiment analysis results over time in a plot while stratifying by an additional variable

Clock2 hours
BeginnerPrincipiante
CloudNo se necesita descarga
VideoVideo de pantalla dividida
Comment DotsInglés (English)
LaptopSolo escritorio

In this guided project, you will learn how to import textual data stored in raw text files into R, turn these files into a corpus (a collection of textual documents), and tokenize the text all using the R software package quanteda. You will then learn how to check for words with positive or negative sentiment within the text, and how to plot the proportion of use for these words over time, while stratifying by a third variable. You will also learn how to carry out a targeted sentiment analysis by looking for words with a positive or negative sentiment that are adjacent to relevant keywords or phrases, and how to compare the results of a targeted sentiment analysis with the results of a generic analysis.

Habilidades que desarrollarás

statistical programmingStatistical ClassificationSentiment AnalysisText CorpusRstudio

Aprende paso a paso

En un video que se reproduce en una pantalla dividida con tu área de trabajo, tu instructor te guiará en cada paso:

  1. Load text documents into R studio, convert a number of text documents into a corpus, and extract data from text document file names and add them to a new column in a dataframe. 

  2. Split up a text document corpus into tokens, or individual words and punctuations. Check for words in the data that have positive or negative sentiment using the Sentiment Dictionary. 

  3. Plot the proportion of positive and negative words over time while stratifying by a third variable. 

  4. Carry out a targeted sentiment analysis by looking for words with a positive or negative sentiment that are adjacent to relevant keywords.

  5. Compare the sentiment for both generic and targeted sentiment analyses while stratifying by a third variable, plotting the results over time.

Cómo funcionan los proyectos guiados

Tu espacio de trabajo es un escritorio virtual directamente en tu navegador, no requiere descarga.

En un video de pantalla dividida, tu instructor te guía paso a paso

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