title: R: Ignoring unknown aesthetics: label
body: <p>I'm getting error in making a plot with geom_point. </p>
  
  <pre><code>library(ggplot2)
  theme_set(theme_bw())
  
  mtcars$`car name` &lt;- rownames(mtcars) 
  mtcars$mpg_z &lt;- round((mtcars$mpg - mean(mtcars$mpg))/sd(mtcars$mpg), 2)  
  mtcars$mpg_type &lt;- ifelse(mtcars$mpg_z &lt; 0, "below", "above") 
  mtcars &lt;- mtcars[order(mtcars$mpg_z), ]  # sort
  mtcars$`car name` &lt;- factor(mtcars$`car name`, levels = mtcars$`car name`) 
  
  ggplot() + 
    geom_point(data=mtcars, aes(x=`car name`, y=mpg_z,label=mpg_z), stat='identity', fill="black", size=6)  +
    geom_text(color="white", size=2) +
    labs(title="Diverging Lollipop Chart", 
         subtitle="Normalized mileage from 'mtcars': Lollipop") + 
    ylim(-2.5, 2.5) +
    coord_flip() 
  </code></pre>
  
  <p>But I was not able to put numbers inside of the points and having the error: </p>
  
  <pre><code>Warning: Ignoring unknown aesthetics: label
  </code></pre>
  
  <p>The plot is here. Thank you in advance!!!
  <a href="https://i.stack.imgur.com/O0iWx.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/O0iWx.png" alt="enter image description here"></a></p>