R：增加ggplot2中分隔线的大小

Question

在此情节中，我必须处理以下问题：

我想增加正方形之间的白色分隔线的大小。 绘图代码为：

p <- ggplot(long_form_mittelwerte2, aes(Var1, Var2)) + 
  geom_tile(aes(fill = Rang), colour = "white") 

pneu2 <- p + 
  scale_fill_gradient(low = "white", high = "blue", limits= c(1, 3), breaks = c(1, 2, 3)) +
  geom_text(aes(label = mittelwerte_text2$value), size = 12, color = "gray0") +
  theme(axis.title.x = element_blank(),
        axis.title.y = element_blank()) +
  theme(axis.text.y = element_text(size = 30, color = "black"), 
        axis.text.x = element_text(size = 30, color = "black")) +
  scale_y_discrete(labels = c(h_Filter3x3="3x3", h_Filter3x5="3x5", h_Filter3x9="3x9"), 
                   expand = c(0, 0)) +
  scale_x_discrete(expand = c(0, 0)) +
  coord_fixed(ratio = 1) +
  guides(fill= guide_colorbar(barheight = unit(10, "cm"))) +
  theme(legend.text = element_text(size = 30, face = "bold"), 
        legend.title = element_blank())

如果您需要数据，请告诉我。 感谢您的帮助。

Answer 1

您可以在geom_tile设置size和colour参数，以调整图块之间的空间和颜色：

mtcars %>%
    ggplot(aes(cyl, am, fill = mpg)) + 
    geom_tile(colour = "white", size = 4)