是否可以使用 ggplot2 将轴上的第 N 个刻度设为粗体?我只想将轴标记为粗体(小线),而不是文本。
在绘图中显示每日数据时,这对于突出显示每 7 个刻度非常有用。我想保留每一天的刻度线。
我无法找到有关此主题的任何内容,任何帮助将不胜感激!
EDIT:这是一个代码示例。我在最后一行扩展了它以增加所有刻度的大小。我想要的是让每个 N 个标签更大。例如每 7 日一次。手动定义每第七个是行不通的,因为我正在处理每天都在变化的数据。
library(ggplot2)
library(lubridate)
theme_set(theme_bw())
df <- economics_long[economics_long$variable %in% c("psavert", "uempmed"), ]
df <- df[lubridate::year(df$date) %in% c(1967:1981), ]
# labels and breaks for X axis text
brks <- df$date[seq(1, length(df$date), 12)]
lbls <- lubridate::year(brks)
# plot
ggplot(df, aes(x=date)) +
geom_line(aes(y=value, col=variable)) +
labs(title="Time Series of Returns Percentage",
subtitle="Drawn from Long Data format",
caption="Source: Economics",
y="Returns %",
color=NULL) + # title and caption
scale_x_date(labels = lbls, breaks = brks) + # change to monthly ticks and labels
scale_color_manual(labels = c("psavert", "uempmed"),
values = c("psavert"="#00ba38", "uempmed"="#f8766d")) + # line color
theme(axis.text.x = element_text(angle = 90, vjust=0.5, size = 8), # rotate x axis text
panel.grid.minor = element_blank(),
axis.ticks.x = element_line(colour = "black", size = 2))
Solution: Thanks to @Jimbou!
Using axis.ticks.x = element_line(colour = "black", size = c(2, rep(1,6)))
leads to this. Perfect for daily Data!