我有超过三个十年的多个数据来源。数据是不连续的并且在多个地方重叠。我想为每个数据源绘制不同颜色的点,然后添加一条使用所有数据源的趋势线。包含的代码有一些示例数据和两个绘图示例。第一次调用 ggplot,为所有数据绘制一条趋势线。第二个 ggplot 调用,用不同的颜色用自己的趋势线清楚地绘制每个源。
library(ggplot2)
the.data <- read.table( header=TRUE, sep=",",
text="source,year,value
S1,1976,56.98
S1,1977,55.26
S1,1978,68.83
S1,1979,59.70
S1,1980,57.58
S1,1981,61.54
S1,1982,48.65
S1,1983,53.45
S1,1984,45.95
S1,1985,51.95
S1,1986,51.85
S1,1987,54.55
S1,1988,51.61
S1,1989,52.24
S1,1990,49.28
S1,1991,57.33
S1,1992,51.28
S1,1993,55.07
S1,1994,50.88
S2,1993,54.90
S2,1994,51.20
S2,1995,52.10
S2,1996,51.40
S3,2002,57.95
S3,2003,47.95
S3,2004,48.15
S3,2005,37.80
S3,2006,56.96
S3,2007,48.91
S3,2008,44.00
S3,2009,45.35
S3,2010,49.40
S3,2011,51.19")
ggplot( the.data, aes( the.data$year, the.data$value ) ) + geom_point() + geom_smooth()
#ggplot( the.data, aes( the.data$year, the.data$value, color=the.data$source ) ) + geom_point() + geom_smooth()
第二个调用显示彩色数据点,我想添加一条表示所有年份的连续趋势线。