ggplot2系列之 theme的相关设置ggplot2系列之 theme的相关设置.pdfVIP

ggplot2 系列之 的theme 相关设置 theme:就是与数据无关的图形设置都可归为主题类。ggplot2 的默认的绘图主题呈 现出一个灰色的样式。 这个是下面的原始图代码做出来的。 # 原始图 p - ggplot(mpg, aes(displ, hwy) ) p - p + geom_point(aes(colour = factor(cyl))) p 我们看一下系统主题的设置 theme_gray theme_gray function (base_size = 12, base_family = ) { theme(line = element_line(colour = black, size = 0.5, linetype = 1, lineend = butt), rect = element_rect(fill = white, colour = black, size = 0.5, linetype = 1), text = element_text(family = base_family, face = plain, colour = black, size = base_size, hjust = 0.5, vjust = 0.5, angle = 0, lineheight = 0.9), axis.text = element_text(size = rel(0.8), colour = grey50), strip.text = element_text(size = rel(0.8)), axis.line = element_blank(), axis.text.x = element_text(vjust = 1), axis.text.y = element_text(hjust = 1), axis.ticks = element_line(colour = grey50), axis.title.x = element_text(), axis.title.y = element_text(angle = 90), axis.ticks.length = unit(0.15, cm), axis.ticks.margin = unit(0.1, cm), legend.background = element_rect(colour = NA), legend.margin = unit(0.2, cm), legend.key = element_rect(fill = grey95, colour = white), legend.key.size = unit(1.2, lines), legend.key.height = NULL, legend.key.width = NULL, legend.text = element_text(size = rel(0.8)), legend.text.align = NULL, legend.title = element_text(size = rel(0.8), face = bold, hjust = 0), legend.title.align = NULL, legend.position = right, legend.direction = NULL, legend.justification = center, legend.box = NULL, panel.background = element_rect(fill = grey90, colour = NA), panel.border = element_blank(), panel.grid.major = element_line(colour = white),