title: Point color in gnuplot 4.0
body: <p>When I try to plot three separate data files using gnuplot, I get an error "';' expected" in the output when I try to change the point color of the data sets.</p>
  
  <p>For example, this works fine:</p>
  
  <pre><code>set terminal jpeg size 900,500
  set xlabel 'x axis label'
  set ylabel 'y axis label'
  set title 'sample title'
  set output "output.jpeg"
  set xrange [-0.1:1.1]
  set yrange [] reverse
  set xtics 0.10
  #set ytics 100
  set key top left
  set grid ytics lt 0 lw 1
  set grid xtics lt 0 lw 1
  
  plot 'file1.dat' u 1:2 w p pt 7 ps 0.8 ti 'dataset 1', \
       'file2.dat' u 1:2 w p pt 6 ps 0.8 ti 'dataset 2', \
       'file3.dat' u 1:2 w p pt 5 ps 0.8 ti 'dataset 3'
  </code></pre>
  
  <p>This does not:</p>
  
  <pre><code>set terminal jpeg size 900,500
  set xlabel 'x axis label'
  set ylabel 'y axis label'
  set title 'sample title'
  set output "output.jpeg"
  set xrange [-0.1:1.1]
  set yrange [] reverse
  set xtics 0.10
  #set ytics 100
  set key top left
  set grid ytics lt 0 lw 1
  set grid xtics lt 0 lw 1
  
  plot 'file1.dat' u 1:2 w p pt 7 ps 0.8 lc 9 ti 'dataset 1', \
       'file2.dat' u 1:2 w p pt 6 ps 0.8 ti 'dataset 2', \
       'file3.dat' u 1:2 w p pt 5 ps 0.8 ti 'dataset 3'
  </code></pre>
  
  <p>Why is this? Is there a workaround to simply change point color independent of point style and size?</p>
  
  <p>Thanks!</p>