R - plotly error object ... not found
<p>I try to run a sample line with iris data set gives object '...' not found error. 
Is there any I need to check specific in my environment? </p>

<pre><code>library(plotly)
p &lt;- plot_ly(iris, x = Petal.Length, y = Petal.Width,color = Species, mode = "markers")
</code></pre>

<blockquote>
  <p>Error in plot_ly(iris, x = Petal.Length, y = Petal.Width, color = Species,  : 
    object 'Petal.Length' not found</p>
</blockquote>