ggplot2中的轴标签被切除或覆盖图形

Question

我有以下数据集。

data <- read.table(text = "value type dimension weight
0.04161712 NODE CAR 25.00
1.42895171 NODE ACTIVE_TRAVEL 25.00
0.00000000 NODE PUBLIC_TRANSPORT 25.00
0.31904447 TRAIN TRAIN 30.00
4.23052201 PLACE DENSITY 25.00
5.75872982 PLACE DIVERSITY 25.00
1.89965811 PLACE DESIGN  25.00
0.00000000 MOTIVATION SECONDARY_SCHOOL 18.75
0.00000000 MOTIVATION HIGHER_EDUCATION 18.75
0.00000000 MOTIVATION WORK 18.75
0.00000000 MOTIVATION INDIVIDUAL_TICKETS 18.75
4.80514639 RIDERSHIP MORNING_PEAK 30.00
5.46293926 EFFORT WALKING_DISTANCE 25.00
6.02066299 EFFORT BIKING_DISTANCE 25.00
0.51790819 EFFORT OTHER 25.00", header = TRUE, stringsAsFactors=FALSE)

在尝试绘制极坐标图时，我运行：

radarplot <- function(data, x, y, width, values = FALSE) {
  df <- data
  lab <- df$dimension
  xlabel <- as.character(substitute(x))
  ylabel <- as.character(substitute(y))
  x <- as.character(eval(substitute(x), df))
  y <- eval(substitute(y), df)
  width <- eval(substitute(width), df)
  pos <- positions(width)
  p <- suppressWarnings(
    ggplot2::ggplot() +
      ggplot2::geom_bar(ggplot2::aes(x = pos, width = width, y = y, fill = x),
                        stat = "identity", colour = "black", size =.2) +
            ggplot2::scale_x_continuous(label = lab, breaks = pos) +
      ggplot2::xlab(xlabel) +
      ggplot2::ylab(ylabel) +
      ggplot2::guides(fill = ggplot2::guide_legend(title = xlabel))
  )
  if(values) {
    p + ggplot2::geom_text(ggplot2::aes(x = pos, y = 0, label = y, vjust = -0.5))
  } else {
    p
  }
}

positions <- function(width) {
  0.5 * (cumsum(width) + cumsum(c(0, width[-length(width)])))
}

但是，当我运行该函数时，轴标签由于某种原因被切断。我已经尝试过调整，并且调整没有成功。

library(ggplot2)    
radarplot(dimensions_sel, type, value, weight) +
      coord_polar(start = -1.5708, theta = "x") +
      theme_gray() +
        theme(axis.ticks = element_blank(),
              axis.text.x = element_text(size = 6, margin = margin(t = 0, b = 0)),
              axis.text = element_blank(),
              axis.title = element_blank(),
              axis.line = element_blank())

如您所见，理想情况下，文本应该在圆之外，但我无法做到这一点。

请注意，这不是正常的圆形图，因为条的宽度因可变的重量而异。