title: Choosing arguments in tidy
body: <p>In a SpatialDataFrame I have the following structure for the data.</p>
  
  <pre><code>&gt; str(shapedata_trans@data)
  'data.frame':   4066 obs. of  6 variables:
   $ OBJECTID  : num  1 2 3 4 5 6 7 8 9 10 ...
   $ PC4       : Factor w/ 4066 levels "1011","1012",..: 1 2 3 4 5 6 7 8 9 10 ...
   $ Aantal_mul: Factor w/ 11 levels "1","10","12",..: 1 1 5 7 1 1 5 1 1 1 ...
   $ Aantal_adr: Factor w/ 2653 levels "1","10","100",..: 2404 2599 320 383 97 2604 60 211 63 1450 ...
   $ Shape_Leng: num  5908 5489 19421 15356 4733 ...
   $ Shape_Area: num  1034025 1214502 5075544 2674418 770406 ...
  </code></pre>
  
  <p>And in addition to that it has more information about the polygons and their coordinates... Which is great.
  However, in order to reduce this to a simple table we can use ggplo2::fortify or broom::tidy</p>
  
  <pre><code>&gt; fort_PC = fortify(shapedata_trans)
  &gt; head(fort_PC)
        long      lat order  hole piece group id
  1 4.906544 52.37910     1 FALSE     1   0.1  0
  2 4.906733 52.37906     2 FALSE     1   0.1  0
  3 4.906739 52.37908     3 FALSE     1   0.1  0
  4 4.907138 52.37901     4 FALSE     1   0.1  0
  5 4.908692 52.37881     5 FALSE     1   0.1  0
  6 4.909105 52.37875     6 FALSE     1   0.1  0
  </code></pre>
  
  <p>However I want to add the information in the @data part to this final table.. Information like the columns PC4, Aantal_mul, Aantal_adr, Shape_Area and Shape_Leng. I know that in fortify/tidy I can specify the region by saying</p>
  
  <pre><code>&gt; head(fortify(shapedata_trans,region = c("PC4")))
        long      lat order  hole piece   id  group
  1 4.906544 52.37910     1 FALSE     1 1011 1011.1
  2 4.906733 52.37906     2 FALSE     1 1011 1011.1
  3 4.906739 52.37908     3 FALSE     1 1011 1011.1
  4 4.907138 52.37901     4 FALSE     1 1011 1011.1
  5 4.908692 52.37881     5 FALSE     1 1011 1011.1
  6 4.909105 52.37875     6 FALSE     1 1011 1011.1
  </code></pre>
  
  <p>But this doesnt make it better. Does anyone have a solution?</p>