title: How to remove the margins from a ggmap
body: <p>I was trying to plot a map using ggmap package without any margin, axis, labels, etc. I was able to remove the labels, and axis but have no idea have to remove the margin here. Any help will be appreciated..!</p>
  
  <pre><code>library("ggmap")
  amap &lt;- get_map(location = c(lon = -95.3632715, lat = 29.7632836), maptype = c("terrain"))
  basemap &lt;- ggmap(amap)
  plot(basemap)
  </code></pre>