我正在尝试为我的ggvis图形添加一个tooltip
。我想在鼠标悬停在密度图上时添加密度数字。这是我现在的代码:
mtcars %>% ggvis(~wt, fill := "red") %>%
layer_densities() %>%
add_axis("x", title = "Weight") %>%
scale_numeric("x", domain = c(0, 5), nice = FALSE, clamp = TRUE) %>%
add_tooltip(function(df){density(df$wt)})
但是当我悬停时,我会收到这个错误提示:
Error in density.default(df$wt) : argument 'x' must be numeric
谢谢!