title: ggplot2 manually specifying color & linetype - duplicate legend
body: <p>I'm creating a plot with multiple linetypes, colors, and filled regions.The code below produces two legends (one shows line types, the other shows line colors) - and I need them to be combined into one legend that shows both linetype and linecolor. [there is a third legend showing the 'fill' objects, but that's fine]</p>
  
  <p>I followed the methodology given here:
  <a href="https://stackoverflow.com/questions/11344561/controlling-line-color-and-line-type-in-ggplot-legend">Controlling line color and line type in ggplot legend</a>
  to try to get a single legend - but ended up with this double-legend behavior - what have I done wrong?</p>
  
  <pre><code>library(ggplot2)
  library(scales)
  data = structure(list(Dates = structure(c(1351713600, 1351717200, 1351720800, 
    1351724400, 1351728000, 1351731600), class = c("POSIXct", "POSIXt"
    ), tzone = "MST"), CumHVAC_Def_Stoch_Min = c(146.4006, 146.6673, 
    146.9336, 147.1996, 147.4648, 147.5964), CumHVAC_Def_Stoch_1st = c(188.0087, 
    188.2753, 188.5416, 188.8077, 189.0729, 189.2045), 
    CumHVAC_Def_Stoch_Mean = c(204.7234, 204.9901, 205.2564, 205.5225, 205.7876, 205.9193), 
    CumHVAC_Def_Stoch_3rd = c(228.8813, 229.1476, 229.4135, 229.6793, 229.9442, 230.0757), 
    CumHVAC_Def_Stoch_Max = c(295.145, 295.4117, 295.6779, 295.944, 296.2092, 296.3408), 
    CumHVAC_Opt_Stoch_Min = c(112.4095, 112.6761, 112.9424, 113.2085, 113.4737, 113.6053), 
    CumHVAC_Opt_Stoch_1st = c(134.8893,135.156, 135.4223, 135.6883, 135.9535, 136.0851), 
    CumHVAC_Opt_Stoch_Mean = c(156.8854, 157.1521, 157.4184, 157.6845, 157.9496, 158.0813), 
    CumHVAC_Opt_Stoch_3rd = c(168.7301, 168.9971, 169.2636, 169.5299, 169.7953, 169.927), 
    CumHVAC_Opt_Stoch_Max = c(241.2483, 241.5151, 241.7814, 242.0476, 242.3128, 242.4444), 
    CumHVAC_Def_Dtrmn = c(188.7523,  189.0189, 189.2852, 189.5513, 189.8165, 189.9481), 
  
    CumHVAC_Opt_Dtrmn = c(86.8116,  87.0782, 87.3445, 87.6105, 87.8757, 88.0073),
    CS_Opt_Stoch = c(0,   0, 0, 0, 0, 0), CS_Opt_Dtrmn = c(0, 0, 0, 0, 0, 0), 
    CS_Default = c(0,   0, 0, 0, 0, 0)), .Names = c("Dates", "CumHVAC_Def_Stoch_Min", 
    "CumHVAC_Def_Stoch_1st", "CumHVAC_Def_Stoch_Mean", "CumHVAC_Def_Stoch_3rd",  
    "CumHVAC_Def_Stoch_Max", "CumHVAC_Opt_Stoch_Min", 
    "CumHVAC_Opt_Stoch_1st","CumHVAC_Opt_Stoch_Mean", "CumHVAC_Opt_Stoch_3rd", 
    "CumHVAC_Opt_Stoch_Max", "CumHVAC_Def_Dtrmn", "CumHVAC_Opt_Dtrmn", "CS_Opt_Stoch", 
    "CS_Opt_Dtrmn",    "CS_Default"), row.names = 691:696, class = "data.frame")
  
  stochdefcolor = 'red'
  stochoptcolor = 'green'
  dtrmndefcolor = 'darkred'
  dtrmnoptcolor = 'darkgreen'
  
  eb09 &lt;- aes(x = Dates, ymax = CumHVAC_Def_Stoch_3rd, ymin = CumHVAC_Def_Stoch_1st, fill="StochDef")
  eb10 &lt;- aes(x = Dates, ymax = CumHVAC_Opt_Stoch_3rd, ymin = CumHVAC_Opt_Stoch_1st, fill="StochOpt")
  State = c('a','b','c','d','e','f','g','h');
  
  ln1 &lt;- aes(x=Dates,y=CumHVAC_Def_Stoch_Mean, color=State[1],linetype=State[1])
  ln2 &lt;- aes(x=Dates,y=CumHVAC_Opt_Stoch_Mean, color=State[2],linetype=State[2])
  ln3 &lt;- aes(x=Dates,y=CumHVAC_Def_Dtrmn,color=State[3],linetype=State[3])
  ln4 &lt;- aes(x=Dates,y=CumHVAC_Opt_Dtrmn,color=State[4],linetype=State[4])
  
  ln5 &lt;- aes(x=Dates,y=CumHVAC_Def_Stoch_Max,color=State[5],linetype=State[5])#,linetype = 2]
  ln6 &lt;- aes(x=Dates,y=CumHVAC_Def_Stoch_Min,color=State[6],linetype=State[6])#,linetype = 3)
  ln7 &lt;- aes(x=Dates,y=CumHVAC_Opt_Stoch_Max,color=State[7],linetype=State[7])#,linetype = 2)
  ln8 &lt;- aes(x=Dates,y=CumHVAC_Opt_Stoch_Min,color=State[8],linetype=State[8])#,linetype = 3)
  
  quartz()
  ggplot(data) + 
    geom_ribbon(eb09, alpha=0.4) +
    geom_ribbon(eb10, alpha=0.4) +
    geom_line(ln1,size=1) + 
    geom_line(ln2,size=1) + 
    geom_line(ln3,size=1) +
    geom_line(ln4,size=1) +
    geom_line(ln5,size=.7) +
    geom_line(ln6,size=.7) +
    geom_line(ln7,size=.7) +
    geom_line(ln8,size=.7) +
    xlab("X-lab") +
    ylab("Y-Lab") +
    opts(title = expression('Dummy Title'),
         panel.background = theme_rect(fill = "transparent"),
         panel.grid.minor = theme_blank(), 
         panel.grid.major = theme_blank(),
         plot.background = theme_rect(fill = "transparent")) + 
    scale_linetype_manual(values=c(1,1,1,1,2,3,2,3)) +      
    scale_colour_manual(name=c("Lines"),
                        values=c(stochdefcolor,
                                 stochoptcolor,
                                 dtrmndefcolor,
                                 dtrmnoptcolor,
                                 stochdefcolor,
                                 stochdefcolor,
                                 stochoptcolor,
                                 stochoptcolor)) + 
    scale_fill_manual(name='1st-3rd Quartiles',
                      breaks=c('StochDef','StochOpt'),
                      values=c(stochdefcolor,stochoptcolor),
                      labels=c('Stoch DEF','Stoch OPT'))
  </code></pre>
  
  <p>...since I'm a new user, I can't post an image...</p>