RG # 5: Grouped box plot

# data orage is from R library
data(Orange)

# to summarize the data
summary (Orange)
 Tree       age         circumference 
 3:7   Min.   : 118.0   Min.   : 30.0 
 1:7   1st Qu.: 484.0   1st Qu.: 65.5 
 5:7   Median :1004.0   Median :115.0 
 2:7   Mean   : 922.1   Mean   :115.9 
 4:7   3rd Qu.:1372.0   3rd Qu.:161.5 
       Max.   :1582.0   Max.   :214.0 
# defining own colors, for each group
mycol = c("darkcyan", "darkgreen", "brown4 ", "darkblue", "darkorchid4")
 boxplot(circumference ~ Tree,  data = Orange, main="Boxplot of circumference by tree ", col = mycol)