将颜色和形状的图例合并为一个图例
我正在使用2 x 2研究设计在ggplot中创建图,并希望使用2种颜色和2个符号对我的4种不同治疗组合进行分类。目前,我有2个图例,一个用于颜色,一个用于两种形状。我如何将它们组合成一个图例,所以我有一个蓝色圆圈,一个红色圆圈,一个蓝色三角形和一个读取三角形? 一些数据: state1 <- c(rep(c(rep("N", 7), rep("Y", 7)), 2)) year <- rep(c(2003:2009), 4) group1 <- c(rep("C", 14), rep("E", 14)) group2 <- paste(state1, group1, sep = "") beta <- c(0.16,0.15,0.08,0.08,0.18,0.48,0.14,0.19,0.00,0.00,0.04,0.08,0.27,0.03,0.11,0.12,0.09,0.09,0.10,0.19,0.16,0.00,0.11,0.07,0.08,0.09,0.19,0.10) lcl <- c(0.13,0.12,0.05,0.05,0.12,0.35,0.06,0.13,0.00,0.00,0.01,0.04,0.20,0.00,0.09,0.09,0.06,0.06,0.07,0.15,0.11,0.00,0.07,0.03,0.05,0.06,0.15,0.06) ucl <- c(0.20,0.20,0.13,0.14,0.27,0.61,0.28,0.27,0.00,1.00,0.16,0.16,0.36,0.82,0.14,0.15,0.13,0.13,0.15,0.23,0.21,0.00,0.15,0.14,0.12,0.12,0.23,0.16) data <- data.frame(state1,year,group1,group2,beta,lcl,ucl) 情节: library(ggplot2) pd <- position_dodge(.65) ggplot(data = data, aes(x = …