title: Mapping specific States and Provinces in R
body: <p>I'm trying to use R to generate a figure with sample localities for my FieldBio project. So far, I've been able to map the US states I want, to map Canada (national border), to overlay these two maps; what I'd like to do, though, is to map the following states/provinces specifically, excluding the others:
  California
  Nevada
  Utah
  Colorado
  Wyoming
  Montana
  Idaho
  Washington
  Oregon
  British Columbia
  Alberta</p>
  
  <p>Here is the code I've been using so far:</p>
  
  <pre><code>&gt;map('state', region = c('california', 'nevada', 'utah', 'colorado', 'wyoming', 'montana', 'idaho', 'oregon', 'washington'), xlim=c(-130,-90), ylim=c(30,60), fill=TRUE, col="gray95")
  
  &gt;map("worldHires","Canada", xlim=c(-130,-90), ylim=c(30,60), col="gray95", fill=TRUE, add=TRUE)
  </code></pre>
  
  <p>This produces a map with the desired states, but canada as a country (cut off at the delimitors I set).</p>
  
  <p>Is there a way to do only the provinces I want? I think I know how to plot the points (I have them as a .csv with lat and long data) on top of this afterward.</p>
  
  <p>I realize that (<a href="https://stackoverflow.com/questions/10763421/r-creating-a-map-of-selected-canadian-provinces-and-u-s-states">R: creating a map of selected Canadian provinces and U.S. states</a>) is pretty similar, but I'm getting a little lost in the code for that particular example, and I don't need to highlight anything specific.</p>
  
  <p>Thanks</p>