title: Assign point color depending on data.frame column value R
body: <p>this is my first question on SO, I hope someone can help me answer it.</p>
  
  <p>I'm reading data from a csv with <code>R</code> with <code>data&lt;-read.csv("/data.csv")</code> and get something like:</p>
  
  <pre><code>Group    x   y  size    Color
  Medium   1   2  2000    yellow
  Small   -1   2  1000    red
  Large    2  -1  4000    green
  Other   -1  -1  2500    blue
  </code></pre>
  
  <p>Each group color may vary, they are assigned by a formula when the <code>csv</code> file is generated, but those are all the possible colors (the number of groups may also vary).</p>
  
  <p>I've been trying to use <code>ggplot()</code> like so:</p>
  
  <pre><code>data&lt;-read.csv("data.csv")
  xlim&lt;-max(c(abs(min(data$x)),abs(max(data$x))))
  ylim&lt;-max(c(abs(min(data$y)),abs(max(data$y))))
  data$Color&lt;-as.character(data$Color)
  print(data)
  ggplot(data, aes(x = x, y = y, label = Group)) +
  geom_point(aes(size = size, colour = Group), show.legend = TRUE) +
  scale_color_manual(values=c(data$Color)) +
  geom_text(size = 4) +
  scale_size(range = c(5,15)) +
  scale_x_continuous(name="x", limits=c(xlim*-1-1,xlim+1))+
  scale_y_continuous(name="y", limits=c(ylim*-1-1,ylim+1))+
  theme_bw()
  </code></pre>
  
  <p>Everything is correct except for the colors</p>
  
  <ul>
  <li>small is drawn blue</li>
  <li>Medium is drawn red</li>
  <li>Other is drawn green</li>
  <li>Large is drawn yellow</li>
  </ul>
  
  <p>I noticed the legend at the right orders the Groups alphabetically (Large, Medium, Other, Small), but the colors stay in the <code>csv</code> file order.</p>
  
  <p>Here is a screenshot of the plot.</p>
  
  <p><a href="https://i.stack.imgur.com/z2lMN.png" rel="noreferrer"><img src="https://i.stack.imgur.com/z2lMN.png" alt="enter image description here"></a></p>
  
  <p>Can anyone tell me what's missing in my code to fix this? other approaches to achieve the same result are welcome.</p>