r - 标题R为中心的空剧情

Question

我正在尝试创建一个空的plotly，并显示一条消息，说明为什么该图作为标题为空。我想将消息水平和垂直居中。

我缺少垂直中心:

empty_plot <- function(title = NULL){
  p <- plotly_empty(type = "scatter", mode = "markers") %>%
    config(
      displayModeBar = FALSE
    ) %>%
    layout(
      title = title
    )
  return(p)
}

empty_plot("Why it is empty")

Answer 1

刚发现选项yref = "paper"，其中y = 0.5位于中间位置:

empty_plot <- function(title = NULL){
  p <- plotly_empty(type = "scatter", mode = "markers") %>%
    config(
      displayModeBar = FALSE
    ) %>%
    layout(
      title = list(
        text = title,
        yref = "paper",
        y = 0.5
      )
    )
  return(p)
} 
empty_plot("Why it is empty")