用千位后的逗号分离重构复杂因子向量
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我想重新格式化因子向量,以便它包含的数字有一千个分隔符。向量包含整数和实数,而没有关于值或顺序的任何特定规则。
Data
特别是,我正在使用类似于下面生成的矢量vec
:
content <- c("0 - 100", "0 - 100", "0 - 100", "0 - 100",
"150.22 - 170.33",
"1000 - 2000","1000 - 2000", "1000 - 2000", "1000 - 2000",
"7000 - 10000", "7000 - 10000", "7000 - 10000", "7000 - 10000",
"7000 - 10000", "1000000 - 22000000", "1000000 - 22000000",
"1000000 - 22000000",
"44000000 - 66000000.8989898989")
vec <- factor(x = content, levels = unique(content))
Desired results
我的目标是重新格式化此向量,以便数字包含类似Excel的1,000分隔符,如下例所示:
100.00 1,000.00 1,000,000.00 1,000,000.56 24,564,000,000.56
Tried approach
我正在考虑使用gsubfn
和一个可以传递数字的原型对象。然后可能创建另一个3位数的原型对象并替换。如下面的代码所示:
gsubfn(pattern = "[0-9][0-9][0-9]", replacement = ~paste0(x, ','),
x = as.character(vec))
这只是部分插入逗号:
"150,.22 - 170,.33"
这显然是错的。我还必须将角色向量转换为因子。因此,我的问题归结为两个要素:
- 我该如何解决逗号问题?
- 如何保持因子的原始结构? - 我需要以与原始序列相同的方式排序因子向量,但在正确的位置使用逗号。
答案
仅在levels
上运行似乎保持您的精度水平,而不是将您的矢量转换为character
矢量并且效率更高,因为它将您操作的数据的大小减小到唯一值(而不是整个矢量)
levels(vec) <- sapply(strsplit(levels(vec), " - "),
function(x) paste(prettyNum(x,
big.mark = ",",
preserve.width = "none"),
collapse = " - "))
vec
# [1] 0 - 100 0 - 100 0 - 100 0 - 100 150.22 - 170.33
# [6] 1,000 - 2,000 1,000 - 2,000 1,000 - 2,000 1,000 - 2,000 7,000 - 10,000
# [11] 7,000 - 10,000 7,000 - 10,000 7,000 - 10,000 7,000 - 10,000 1,000,000 - 22,000,000
# [16] 1,000,000 - 22,000,000 1,000,000 - 22,000,000 44,000,000 - 66,000,000.8989898989
# Levels: 0 - 100 150.22 - 170.33 1,000 - 2,000 7,000 - 10,000 1,000,000 - 22,000,000 44,000,000 - 66,000,000.8989898989
另一答案
使用正向前瞻性正则表达式...
content <- c("0 - 100", "0 - 100", "0 - 100", "0 - 100",
"1000 - 2000","1000 - 2000", "1000 - 2000", "1000 - 2000",
"7000 - 10000", "7000 - 10000", "7000 - 10000", "7000 - 10000",
"7000 - 10000", "1000000 - 22000000", "1000000 - 22000000",
"1000000 - 22000000")
gsub("(\d)(?=(?:\d{3})+\b)", "\1,", content, perl=T)
# [1] "0 - 100" "0 - 100" "0 - 100"
# [4] "0 - 100" "1,000 - 2,000" "1,000 - 2,000"
# [7] "1,000 - 2,000" "1,000 - 2,000" "7,000 - 10,000"
# [10] "7,000 - 10,000" "7,000 - 10,000" "7,000 - 10,000"
# [13] "7,000 - 10,000" "1,000,000 - 22,000,000" "1,000,000 - 22,000,000"
# [16] "1,000,000 - 22,000,000"
另一答案
也许你可以使用formatC
:
sapply(
X = lapply(
X = strsplit(x = content, split = " - "),
FUN = function(x) {
formatC(x = as.numeric(x), format = "f", flag = "#", big.mark = ",",
decimal.mark = ".", digits = 2, drop0trailing = FALSE)
}
),
FUN = paste, collapse = " - "
)
# [1] "0.00 - 100.00" "0.00 - 100.00" "0.00 - 100.00"
# [4] "0.00 - 100.00" "150.22 - 170.33" "1,000.00 - 2,000.00"
# [7] "1,000.00 - 2,000.00" "1,000.00 - 2,000.00" "1,000.00 - 2,000.00"
# [10] "7,000.00 - 10,000.00" "7,000.00 - 10,000.00" "7,000.00 - 10,000.00"
# [13] "7,000.00 - 10,000.00" "7,000.00 - 10,000.00" "1,000,000.00 - 22,000,000.00"
# [16] "1,000,000.00 - 22,000,000.00" "1,000,000.00 - 22,000,000.00" "44,000,000.00 - 66,000,000.90"
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