[R] scale_*_manual in ggplot2

Wed Aug 13 15:01:39 CEST 2014

Data
this is the data I used for the following problems:

dput(sdf)
structure(list(weeks = c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 
13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 
29, 30), values = c(9.45, 7.99, 9.29, 11.66, 12.16, 10.18, 8.04, 
11.46, 9.2, 10.34, 9.03, 11.47, 10.51, 9.4, 10.08, 9.37, 10.62, 
10.31, 10, 13, 10.9, 9.33, 12.29, 11.5, 10.6, 11.08, 10.38, 11.62, 
11.31, 10.52), deviation = c(-0.550000000000001, -2.01, 
-0.710000000000001, 
1.66, 2.16, 0.18, -1.96, 1.46, -0.800000000000001, 0.34, 
-0.970000000000001, 
1.47, 0.51, -0.6, 0.0800000000000001, -0.630000000000001, 
0.619999999999999, 
0.31, 0, 3, 0.9, -0.67, 2.29, 1.5, 0.6, 1.08, 0.380000000000001, 
1.62, 1.31, 0.52), cusums = c(-0.550000000000001, -2.56, -3.27, 
-1.61, 0.549999999999999, 0.729999999999999, -1.23, 0.229999999999999, 
-0.570000000000002, -0.230000000000002, -1.2, 0.269999999999998, 
0.779999999999998, 0.179999999999998, 0.259999999999998, 
-0.370000000000003, 
0.249999999999996, 0.559999999999997, 0.559999999999997, 3.56, 
4.46, 3.79, 6.08, 7.58, 8.18, 9.26, 9.64, 11.26, 12.57, 13.09
), ma = c(NA, 1.46, 1.3, 2.37, 0.5, 1.98, 2.14, 3.42, 2.26, 1.14, 
1.31, 2.44, 0.960000000000001, 1.11, 0.68, 0.710000000000001, 
1.25, 0.309999999999999, 0.31, 3, 2.1, 1.57, 2.96, 0.789999999999999, 
0.9, 0.48, 0.699999999999999, 1.24, 0.309999999999999, 0.790000000000001
), Vupper = c(32.59, 32.09, 31.59, 31.09, 30.59, 30.09, 29.59, 
29.09, 28.59, 28.09, 27.59, 27.09, 26.59, 26.09, 25.59, 25.09, 
24.59, 24.09, 23.59, 23.09, 22.59, 22.09, 21.59, 21.09, 20.59, 
20.09, 19.59, 19.09, 18.59, 18.09), Vlower = c(-6.41, -5.91, 
-5.41, -4.91, -4.41, -3.91, -3.41, -2.91, -2.41, -1.91, -1.41, 
-0.910000000000004, -0.410000000000004, 0.0899999999999963, 
0.589999999999996, 
1.09, 1.59, 2.09, 2.59, 3.09, 3.59, 4.09, 4.59, 5.09, 5.59, 6.09, 
6.59, 7.09, 7.59, 8.09)), .Names = c("weeks", "values", "deviation", 
"cusums", "ma", "Vupper", "Vlower"), row.names = c(NA, -30L), class = 
"data.frame")

Problem1:
I am trying to create a chart using ggplot2. This plot contains 2 
geom_lines and 1geom_point.
But for some reason the geom_point is not being picked up by the legend. 
Can someone help me explain why that maybe?
This is the code I have used for the above data.

vmaskPlot <- ggplot(sdf,aes(ymin=min(sdf$cusums,sdf$Vupper,sdf$Vlower),
                        ymax=(max(sdf$cusums,sdf$Vupper,sdf$Vlower)),
                        x=week))+
  labs(x=NULL,y=NULL)+
  #   theme (panel.grid.major=element_line(color="white",size=0.5),
  #          panel.grid.minor=element_blank(),
  #          panel.grid.major.x=element_blank(),
  #          axis.line.y=element_line(color="black"),
  #          panel.background=element_rect(fill="lightgray"))+
  #   guide=guide_legend(direction="horizontal", 
  #                      title.position="top",
  #                      label.position="bottom",
  #                      label.hjust=0.5,
  #                      label.vjust=0.5,
  #                      label.theme=element_text(angle=90))+
scale_y_continuous()+
  scale_x_discrete(breaks=seq(min(sdf$week),
                              max(sdf$week)))+
  geom_point(aes(y=cusums,colour="Cusum"),size=4,pch=15)+
  geom_line(aes(y=Vupper,colour="Vupper"),size=2.5,alpha=1/2)+ #alpha = 
determines the ° of transparency 
  geom_line(aes(y=Vlower,colour="Vlower"),size=2.5,alpha=1/2)+
  geom_hline(aes(yintercept=0),colour="gray20",size=1)+ #geom_hline - 
draws a reference line at 0
  ggtitle("V-Mask Cusum")+
  theme(legend.position=c(0.9,0.9),
        plot.title=element_text(family="Times",
                                face="bold",
                                size=20))+
  scale_color_manual(name="Legend",
                     breaks=c("cusums","Vupper","Vlower"),
                     values=c("dodgerblue1","brown3","darkolivegreen4"),
                     labels=c("CuSums","Upper V-Mask ","Lower V-Mask "))

vmaskPlot
Problem2:
In this ggplot, the legend is coming in separate boxes ? is there any way 
I can combine them in same? Also where it says ?tabuCusum$cusums? ? I just 
want it to say ?CuSums?. I thought I had mentioned this in my code, so why 
is it not picking up?
Furthermore, the code doesn?t seem to pick up the colours I suggested, 
except for the bars ? which are exactly like I want them to be.
But I want the pink dots to dodgerblue1. The 2 horizontal lines close to 
y=0 were supposed to be gold2 colour and the 2 outer horizontal lines were 
supposed to be darkorchid colour as mentioned in the code. 
Does anyone know why it?s not picking up the colours mentioned?
Following is my code:
ggplot(sdf,aes(x=weeks,
                     ymin=min(sdf$cusums,sdf$Tupper,sdf$Tlower)-3,
                     ymax=max(sdf$cusums,sdf$Tupper,sdf$Tlower)+3))+
  labs(x=NULL,y=NULL)+
  scale_y_continuous(expand=c(0,0),
                     minor_breaks=seq(round(min(sdf$cusums,sdf$Tupper,
sdf$Tlower)-2),
                                      round(max(sdf$cusums,sdf$Tupper,
sdf$Tlower)+2),
                                      1),
                     breaks=seq(round(min(sdf$cusums,sdf$Tupper,sdf$Tlower
)-2),
                                round(max(sdf$cusums,sdf$Tupper,sdf$Tlower
)+2),
                                2))+
  scale_x_discrete(expand=c(0,0),
                   breaks=seq(min(sdf$weeks),
                              max(sdf$weeks)))+
  geom_bar(data=sdf,aes(y=sdf$Tupper,fill="sdf$Tupper"),stat="identity")+
  geom_bar(data=sdf,aes(y=sdf$Tlower,fill="sdf$Tlower"),stat="identity")+
  geom_point(aes(y=sdf$cusums,colour="sdf$cusums"),size=4,pch=15)+
  geom_hline(aes(yintercept=0,colour="Line1"),size=1)+ 
  geom_hline(aes(yintercept=5,colour="Line2"),size=2,alpha=1/1.3)+ 
#Out-Of-Signal Lines
  geom_hline(aes(yintercept=-5,colour="Line3"),size=2,alpha=1/1.3)+ 
#Out-Of-Signal Lines
  geom_hline(aes(yintercept=0.5,colour="Line4"),size=2,alpha=1/1.3)+ #K 
  geom_hline(aes(yintercept=-0.5,colour="Line5"),size=2,alpha=1/1.3)+ #K
  theme(legend.position=c(0.1,0.7),
        plot.title=element_text(family="Times",
                                face="bold",
                                size=20))+
#   guides(linetype = guide_legend(override.aes = list(colour = 
c("gray20","darkorchid","darkorchid","gold2","gold2"))))+
# 
override.aes=list(colour=c("gray20","darkorchid","darkorchid","gold2","gold2")) 

  # LEGEND FOR BAR CHART
  scale_fill_manual(name="Legend",
                    breaks=c("sdf$Tlower","sdf$Tupper","sdf$cusums",
                             "Line1","Line2","Line3","Line4","Line5"),
                    values=c("darkolivegreen4","brown3","dodgerblue1",
                             "gray20","darkorchid","darkorchid","gold2",
"gold2"),
                    labels=c("Lower Tabular Mask","Upper Tabular Mask",
"Cusum",
                             "Line1","Line2","Line3","Line4","Line5"))

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