---
title: "Sentiment Analysis"
author: "Prof. Eric A. Suess"
date: "March 17, 2021"
output:
  beamer_presentation: default
  ioslides_presentation: default
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = FALSE)
```

## Sentiment Analysis

In our book the process for Sentiment Analysis is to join a sentiment dataset and do dictionary look ups.

![](images/tidyflow-ch-2.png)

## sentimentr R Package

There is a very nice R package called [sentimentr](https://github.com/trinker/sentimentr) that can also be used for sentiment analysis.  Check out the website.

## Comparing sentiment dictionaries

In the book different sentiment dictionaries are compared.

What are the sentiment values for each dictionary?


## Wordclouds

Wordclouds can be used to compare document or compare words sentiment within a document.  This can be done for an entire corpus also.

What is wrong with word clouds?

Basically two dimensions are changing when only one variable is changing.