如何在R中可视化具有不同起始值的数据？(即标准化，使每个数据都从零开始)

library(ggplot2)
library(scales)

data <- data.frame(category = c("A", "B", "C"),
                   value = c(10, 20, 30))

data$value_scaled <- scale(data$value)

ggplot(data, aes(x = category, y = value_scaled)) +
  geom_bar(stat = "identity", fill = "blue") +
  labs(x = "Category", y = "Scaled Value") +
  scale_y_continuous(labels = percent_format())  # 可选步骤，添加百分比标签