title: How do I tell R to fill the circle dots with colour on a scatter plot?
body: <p>I want to fill the solid circle dots on my scatterplot with colour.
  I have tried this:</p>
  
  <pre><code>&gt;  plot(dframe1$TV~dframe1$Books)
  &gt;  xlab="Number of books read per month"
  &gt;  plot(dframe1$TV~dframe1$Books,
            xlab="Number of books read per month")
  &gt; plot(dframe1$TV~dframe1$Books,
           xlab="Number of books read per month",
           ylab="Hours of TV watched per week",
           main="Associations between time spent watching TV and reading",
           col.main="red",
           cex=1.5,
           pch=21,
           bg=”light green”)
   Error: unexpected input in:
  "pch=21,bg=”"
  </code></pre>
  
  <p>It does not work.
  I would appreciate advice/help. :)</p>