title: Gnuplot: linetype Version 5.0 patchlevel 3
body: <p>I am using gnuplot 5.9 patchlevel 3 and I wanted to use different <code>lt</code> thus I wanted to reproduce the following this <a href="http://gnuplot.sourceforge.net/demo/lines_arrows.html" rel="nofollow noreferrer">tutorial</a> from gnuplot 5.0 patchlevel 1.</p>
  
  <p>In particular if I copy it and launch it both from term and as .eps I couldn't see dashed lines, here the output <a href="https://i.stack.imgur.com/GOLYP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GOLYP.png" alt="example"></a></p>
  
  <p>In particular I do not understand the following line:</p>
  
  <p><code>You will only see dashed lines if your current terminal setting permits it</code></p>
  
  <p>What does it mean? How I can 'force' gnuplot to print the different dashed lines in .eps, .png or via screen?</p>
  
  <p>I found <a href="https://sourceforge.net/p/gnuplot/bugs/793/" rel="nofollow noreferrer">this</a> guide but its refer to a 4.2.5 version of gnuplot, even if I use:</p>
  
  <p><code>set termoption dashed</code>
  or
  <code>set terminal x11 dashed</code></p>
  
  <p>I can't see the dashed lines...Those are the terminals I can use in gnuplot 5.0 patchlevel 3 from <code>help term</code>:</p>
  
  <blockquote>
  <pre><code>canvas            cgm               context           corel
  dumb              dxf               eepic             emf
  emtex             epslatex          fig               hpgl
  latex             mf                mp                pcl5
  pop               postscript        pslatex           pstex
  pstricks          push              qms               svg
  tek40xx           tek410x           texdraw           tgif
  tkcanvas          tpic              vttek             x11
  xlib              xterm
  </code></pre>
  </blockquote>
  
  <p>I red also this <a href="https://stackoverflow.com/questions/12601348/gnuplot-png-output-doesnt-plot-dashed-dotted-lines">answer</a> but gnuplot 5.0 doesn't support pngcairo (???) as a test, in fact, I just try:</p>
  
  <p><code>set term pngcairo dashed</code></p>
  
  <p>And I receive the answer:</p>
  
  <p><code>Terminal type set to 'unknown'
                    ^
           unknown or ambiguous terminal type; type just 'set terminal' for a list</code></p>
  
  <p>Thus I tried to install pngciaro following <a href="https://stackoverflow.com/questions/10496469/how-do-i-enable-the-pngcairo-terminal-in-gnuplot">this page</a> using homebrew which I found not so useful unfortunately due to the fact that the question about gnuplot 5.0 does not have an answer and because I receive some warning that could be connected with the installation of the pngcairo. </p>