title: Set custom range for y axis in R plotly
body: <p>Simple question, but I've been trying fruitlessly for the better part of an hour.</p>
  
  <p>I have a scatter chart built with the plotly package in R. The vertical axis of this chart is logarithmic, and I want to set the range of the y axis to reach from 0 to 1E7 with ticks every every 10^i. How do I do this?</p>