title: R map plot without longitude and latitude
body: <p>I would like to plot the R map without the longitude and latitude values. Most of the map functions use longitude and latitude values. The only information I have is the name of the state and frequency. Please let me know how to plot the R map.  </p>
  
  <pre><code>    state   freq
  1   california  14717
  2   texas   6842
  3   new york    6729
  4   florida 6720
  5   illinois    5921
  6   NA  5897
  7   georgia 5008
  8   ohio    4197
  9   michigan    3593
  10  virginia    3278
  11  new jersey  3097
  12  north carolina  3084
  13  washington  3048
  14  pennsylvania    2972
  15  maryland    2821
  16  missouri    2615
  17  minnesota   2318
  18  massachusetts   2242
  19  colorado    2210
  20  indiana 2078
  21  arizona 1901
  22  wisconsin   1842
  23  oregon  1817
  24  tennessee   1737
  25  alabama 1679
  26  connecticut 1627
  27  south carolina  1122
  28  nevada  1090
  29  kansas  1062
  30  kentucky    983
  31  oklahoma    971
  32  louisiana   954
  33  utah    877
  34  arkansas    855
  35  mississippi 787
  36  nebraska    674
  37  idaho   599
  38  new hampshire   551
  39  new mexico  472
  40  rhode island    435
  41  hawaii  409
  42  west virginia   391
  43  montana 330
  44  delaware    300
  45  vermont 207
  46  alaska  200
  47  south dakota    189
  48  iowa    186
  49  wyoming 150
  50  maine   101
  51  north dakota    52
  </code></pre>