列“ x”，“ y”必须是一维原子向量或列表

Question

我正在构建一个ggplot包装函数，用于多个绘图。现在，我收到了一个我不明白的错误。

这是我的功能：

library(tidyverse)

plot_hist_trend <- function(df, title, subtitle = "", x_axis, y_axis, point_color) {
  df %>%
   ggplot(aes(x_axis, y_axis)) +
    geom_smooth(color = "black") +
    geom_point(color = point_color) +
    theme(legend.position = "right") +
    labs(title = title,
         subtitle = subtitle,
         x = "",
         y = "",
         caption = "Data: NOAA")
}

这是我数据框的子集。

df <- structure(list(year = c(2018L, 2017L, 2016L, 2015L, 2014L), n = c(52L, 
53L, 47L, 47L, 55L)), .Names = c("year", "n"), row.names = c(NA, 
-5L), class = c("tbl_df", "tbl", "data.frame"))

...但是当我绘制ggplot2对象时，我遇到了这个1d atomic vector or list错误。

plot_hist_trend(df, title = "Title",
                  x_axis = year, y_axis = n,
                  point_color = "#D0021B")

提前Tnx！

Answer 1

尝试此代码！它对我有用

plot_hist_trend(df, title = "Title",
            x_axis =df$year, y_axis = df$n,
            point_color = "#D0021B")

Answer 2

您可以选择使用rlang::enexpr或base::substitute来解决以下问题，然后使用aes_q中的ggplot

plot_hist_trend <- function(df, title, subtitle = "", x_axis, y_axis, point_color) {
    x_axis <- rlang::enexpr(x_axis)
    y_axis <- rlang::enexpr(y_axis)
    df %>%
        ggplot(aes_q(x_axis, y_axis)) +
        geom_smooth(color = "black") +
        geom_point(color = point_color) +
        theme(legend.position = "right") +
        labs(title = title,
             subtitle = subtitle,
             x = "",
             y = "",
             caption = "Data: NOAA")
}

我希望这对您有用，否则请通知。