title: R plots : using RGB values from dataframe
body: <p>I am having trouble using RGB colours present in a dataframe. </p>
  
  <pre><code>color.table
      V1  V2  V3    
      1   Red 255,0,0
      2   Orange Red  255,69,0
      3   LimeGreen   50,205,50
      4   Green   0,128,0
      5   DarkGreen   0,100,0
      6   GreenYellow 194,225,5
      7   Yellow  255,255,0
      8   Aquamarine  102,205,170
      9   PaleTurquoise   138,145,208
      10  IndianRed   205,92,92
      11  DarkSalmon  233,150,122
      12  DarkKhaki   189,183,107
      13  Silver  128,128,128
      14  Gainsboro   192,192,192
      15  White   255,255,255
  </code></pre>
  
  <p>It seems that I cannot use the RGB present in this dataframe. </p>
  
  <pre><code>barplot(seq(1:15) , col=color.table$V3 )
  Error in rect(y1, x1, y2, x2, ...) : 
    invalid color specification "255,0,0"
  </code></pre>
  
  <p>Even if I try to convert the RGB in Hexadecimal value, there is something odd. </p>
  
  <pre><code>rgb(color.table$V3[1], 50, m=255)
  Error in rgb(color.table$V3[1], 50, m = 255) : 
    argument "blue" is missing, with no default
  </code></pre>
  
  <p>Where as this works:</p>
  
  <pre><code>&gt; rgb(255,0,0, 50, m=255)
  [1] "#FF000032"
  </code></pre>
  
  <p>There is something fishy here, but I can't put my finger on it. Any advice much appreciated. </p>