title: How to change legend labels in ggplot2 for visualizing data in R?
body: <p>I am using ggplot2 to visualize some data in R.</p>
  
  <p>Therefore I use the following command:</p>
  
  <pre><code>ggplot(second_sentiment_counts)+
    aes(x = sentiment, y = n, fill = as.factor(sentiment)) +
    geom_bar(stat = "identity") +
    labs(title = "Deep Learning\nSentiment Analysis Results using RNTN",
         x = "Sentiments",
         y = "Occurences") +
    scale_fill_manual(values = c("darkred", "red4", "blue", "green4", "darkgreen"),
                      name = "Sentiment\nValues")
  </code></pre>
  
  <p>This gives me the following plot:<a href="https://i.stack.imgur.com/Z9GSs.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Z9GSs.png" alt="enter image description here"></a></p>
  
  <p>However, I would like to change the legend labels, so that "-1" is "very negative" or "+1" is "very positive". </p>
  
  <p>Can anybody help me with that?</p>