title: Gnuplot types of error bars
body: <p>Can we change the type of line used by gnuplot in the errorbars?
  This is my gnuplot code:</p>
  
  <pre><code>set terminal postscript eps color
  set output '| epstopdf --filter --outfile=plot.pdf'
  set xlabel  "Simulation days"
  set xtics nomirror
  set ylabel  "Time (seconds)"
  set ytics nomirror
  set logscale y
  set key left top
  plot "data1.csv" using 1:($2/1000):($3/1000) with yerrorbars pt 5,\
  "data2.csv" using 1:($2/1000):($3/1000) with yerrorbars pt 7
  </code></pre>
  
  <p>The error bars from the first plot are different from the second one.
  The first line is solid, but the second is dotted.
  Its possible to define the style of the error bar?</p>