Vector, ggplot2 doesn't know how to deal with data of class numeric
<p>I'm trying to make a simple boxplot with ggplot2. I've got a vector with numbers but when I type in the code an this error message appears: </p>

<blockquote>
  <p>Error: ggplot2 doesn't know how to deal with data of class numeric. </p>
</blockquote>

<p>What does that mean? </p>

<p>Code:</p>

<pre><code>vector1 &lt;- c(x1, x2, x3, ...)
library(ggplot2) 
ggplot(vector1, aes(x=x, y=value)) + boxplot()
</code></pre>