我正在尝试创建一个比较不同算法的运行时间的图。通过运行以下R代码,我得到以下情节,我通常对此表示满意。但是:从该图中读取值可能很困难,是否有办法为每个实例获取每个DBMS的绘制平均值?例如gplus-combined
,CacheDBMS
的值约为50,而BranchDBMS
的值约为200。
ggplot(dt, aes(reorder(instance, V9), V9)) +
geom_point(aes(group=V2, colour=V2), stat='summary', fun.y='mean') +
geom_line(aes(group=V2, colour=V2), stat='summary', fun.y='mean') +
scale_y_log10() +
ylab("Mean wall time") +
xlab("") +
ggtitle("Comparison of Database Management Systems") +
theme_bw() +
theme(axis.text.x = element_text(angle=45, vjust = 1, hjust = 1)) +
guides(color=guide_legend(title="DBMS"))
我想要每个点的y值。优选作为表格,例如
BranchDBMS gplus-combined 213.21
CacheDBMS gplus-combined 48.68
修改
输入数据的小片段(超出10000行)。我删除了未使用的列,因此V*
不正确。但V2
是第一列,V9
是第二列,instance
是最后一栏。
BranchDBMS; 0.163352; facebook-combined
BranchDBMS; 0.169043; facebook-combined
BranchDBMS; 0.162545; facebook-combined
BranchDBMS; 0.159489; facebook-combined
BranchDBMS; 0.168414; facebook-combined
CacheDBMS ; 0.038515; facebook-combined
CacheDBMS ; 0.037179; facebook-combined
CacheDBMS ; 0.037385; facebook-combined
CacheDBMS ; 0.036514; facebook-combined
BranchDBMS; 281.149423; gplus-combined
BranchDBMS; 261.093502; gplus-combined
BranchDBMS; 258.816546; gplus-combined
CacheDBMS ; 22.442501; gplus-combined
CacheDBMS ; 22.377717; gplus-combined
CacheDBMS ; 22.469739; gplus-combined
CacheDBMS ; 22.451922; gplus-combined
答案 0 :(得分:5)
以下是使用内置iris
数据框直接将值标签添加到图表的示例:
p1 = ggplot(iris, aes(Sepal.Width, Sepal.Length, colour=Species)) +
stat_summary(fun.y=mean, geom="line", alpha=0.5) +
stat_summary(fun.y=mean, geom="text", aes(label=sprintf("%1.1f", ..y..)),
size=3, show.legend=FALSE) +
guides(colour=guide_legend(override.aes = list(alpha=1, lwd=1)))
..y..
是每个Sepal.Width
的每个Species
值的内部计算均值。因为我们使用alpha=0.5
作为行geom,override.aes
允许我们在图例中使用更大胆的行。
添加数据值表的一种方法如下:
library(gridExtra)
library(dplyr)
# Change default fontsize for the data table
mytheme <- ttheme_default(
core = list(fg_params=list(cex = 0.7)),
colhead = list(fg_params=list(cex = 0.75)),
rowhead = list(fg_params=list(cex = 0.75)))
# Create table (in this case I just show the first three values for each species)
tab = tableGrob(iris %>% group_by(Species, Sepal.Width) %>%
summarise(`Mean Sepal Length`=sprintf("%1.1f", mean(Sepal.Length))) %>%
slice(1:3), theme=mytheme, rows=NULL)
# Lay out graph and table
grid.arrange(p1, tab, ncol=1)