我正在尝试使用geom_col为时间序列（年度和季度）中的值绘制列。
当我使用Zoo包的 YearQtr 数据类型作为 x 轴值并将 y 轴值四舍五入为整数时，geom_col 似乎没有使用默认的 postion = 'identity'来确定基于 y 值的列栏高度每次出现。相反，它似乎切换到position = 'count'并将舍入的 y 值视为因子，计算每个因子值的出现次数（例如，3 次出现的舍入 y 值 = 11）
如果我切换到 geom_line，则该图适用于每季度的 x 轴值和四舍五入的 y 轴值。
library(zoo)
library(ggplot2)
Annual.Periods <- seq(to = 2020, by = 1, length.out = 8) # 8 years
Quarter.Periods <- as.yearqtr(seq(to = 2020, by = 0.25, length.out = 8)) # 8 Quarters
Values <- seq(to = 11, by = 0.25, length.out = 8)
Data.Annual.Real <- data.frame(X = Annual.Periods, Y = round(Values, 1))
Data.Annual.Whole <- data.frame(X = Annual.Periods, Y = round(Values, 0))
Data.Quarter.Real <- data.frame(X = Quarter.Periods, Y = round(Values, 1))
Data.Quarter.Whole <- data.frame(X = Quarter.Periods, Y = round(Values, 0))
ggplot(data = Data.Annual.Real, aes(X, Y)) + geom_col()
ggplot(data = Data.Annual.Whole, aes(X, Y)) + geom_col()
ggplot(data = Data.Quarter.Real, aes(X, Y)) + geom_col()
ggplot(data = Data.Quarter.Whole, aes(X, Y)) + geom_col() # appears to treat y-values as factors and uses position = 'count' to count occurrences (e.g., 3 occurrences have a rounded Value = 11)
ggplot(data = Data.Quarter.Whole, aes(X, Y)) + geom_line()
rstudioapi::versionInfo()
# $mode
# [1] "desktop"
#
# $version
# [1] ‘1.3.959’
#
# $release_name
# [1] "Middlemist Red"
sessionInfo()
# R version 4.0.0 (2020-04-24)
# Platform: x86_64-apple-darwin17.0 (64-bit)
# Running under: macOS Mojave 10.14.6
#
# Matrix products: default
# BLAS: /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
# LAPACK: /Library/Frameworks/R.framework/Versions/4.0/Resources/lib/libRlapack.dylib
#
# locale:
# [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
#
# attached base packages:
# [1] stats graphics grDevices utils datasets methods base
#
# other attached packages:
# [1] ggplot2_3.3.1 zoo_1.8-8
