R 使用 NA 数据类型 dbl 创建 tibble 行

Question

如何以 tibble 格式创建一行，数据类型为 <dbl> ？

(不是 <lgl>，如下例所示)

NAs <- rep(NA, 10)
NAs1 <- t(tibble(NAs))
NAs2 <- as_tibble(NAs1)
NAs2

# # A tibble: 1 x 10
#   V1    V2    V3    V4    V5    V6    V7    V8    V9    V10  
#   <lgl> <lgl> <lgl> <lgl> <lgl> <lgl> <lgl> <lgl> <lgl> <lgl>
# 1 NA    NA    NA    NA    NA    NA    NA    NA    NA    NA   

提前致谢。

Answer 1

您可以使用NA_real_来指定NA的类型。

tibble::as_tibble(t(rep(NA_real_, 10)))

# # A tibble: 1 x 10
#      V1    V2    V3    V4    V5    V6    V7    V8    V9   V10
#   <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
# 1    NA    NA    NA    NA    NA    NA    NA    NA    NA    NA

来自？NA:

NA is a logical constant of length 1 which contains a missing value indicator. NA can be coerced to any other vector type except raw. There are also constants NA_integer_, NA_real_, NA_complex_ and NA_character_ of the other atomic vector types which support missing values: all of these are reserved words in the R language.