减少 ggpairs 图中的线条粗细和“Corr：”字体大小

Question

我正在做 ggpairs 图，但回归线太粗，并且“Corr：”文本字体太大。

data(mtcars)
head(mtcars)

mtcars$am <- as.factor(mtcars$am)

g <- ggpairs( 
  data = mtcars,
  lower = list(
    continuous = wrap("smooth", alpha = 0.3, color = "blue") 
    )
  )
g <- g + theme(
    axis.text = element_text(size = 6),
    axis.title = element_text(size = 6),
    legend.background = element_rect(fill = "white"),
    panel.grid.major = element_line(colour = NA),
    panel.grid.minor = element_blank(),
    panel.background = element_rect(fill = "grey95")
  )
print(g, bottomHeightProportion = 0.5, leftWidthProportion = .5)

这是输出：

我在GGally文档中找不到可以设置它的地方。

有什么指点吗？

Answer 1

尝试增加字体大小：

data(mtcars)
head(mtcars)

mtcars$am <- as.factor(mtcars$am)

library(ggplot2)
library(GGally)

lowerFn <- function(data, mapping, ...) {
  p <- ggplot(data = data, mapping = mapping) +
    geom_point(color = 'blue', alpha=0.3, size=4) +
    geom_smooth(color = 'black', method='lm', size=1,...)
  p
}

g <- ggpairs( 
  data = mtcars,
  lower = list(
    continuous =  wrap(lowerFn) #wrap("smooth", alpha = 0.3, color = "blue", lwd=1) 
  ),
  upper = list(continuous = wrap("cor", size = 5))
)
g <- g + theme(
  axis.text = element_text(size = 6),
  axis.title = element_text(size = 6),
  legend.background = element_rect(fill = "white"),
  panel.grid.major = element_line(colour = NA),
  panel.grid.minor = element_blank(),
  panel.background = element_rect(fill = "grey95")
)
print(g, bottomHeightProportion = 0.5, leftWidthProportion = .5)