title: Unable to plot bargraph using gnuplot
body: <p>I'm seeing an issue while plotting the bar graph using gnuplot. Im using gnuplot version 4.6 on Windows 7. I'm seeing an error message ";" expected.</p>
  
  <p>Here is the logic:</p>
  
  <pre><code># bar graph
  #set title "Programming language"
  set xlabel "Programming"
  set ylabel "Execution time"
  set auto x
  set yrange [0:120]
  set style data histogram
  set style histogram cluster gap 1
  set style fill solid border -1
  set boxwidth 0.9
  set xtic scale 0
  plot 'bar-graph.dat' using 2:xtic(1) title "Python" col fc rgb "#4671d5", '' u 3 title "Java" col fc rgb "#ff0000", '' u 4 title "C++" col fc rgb "#f36e00"
                                                                                                                                ^
           ';' expected
  </code></pre>
  
  <p>Here is the data:</p>
  
  <pre><code>"Python"         50   70     66.5
  "Java"           30   50     48
  "C++"            10   20    14.8
  </code></pre>
  
  <p>I wanted to plot a joined bar graph similar to Microsoft Excel. Please let me know what I'm missing.</p>
  
  <p>Thanks,
  Anand</p>