feather_metadata
的R-help状态“返回维度,字段名称和类型;以及可选的数据集描述”。但是没有关于如何添加数据描述的信息。我希望它可以作为属性添加,但似乎不起作用。
library(feather)
dat <- data.frame(a = 1:3, b = 4:6)
attr(dat, "description") <- "A data.frame"
write_feather(dat, "df.feather")
str(feather_metadata("df.feather"))
str
回归:
List of 5
$ path : chr "df.feather"
$ dim : int [1:2] 3 2
$ types : Named chr [1:2] "integer" "integer"
..- attr(*, "names")= chr [1:2] "a" "b"
$ description: chr ""
$ version : int 2
- attr(*, "class")= chr "feather_metadata"
我刚刚提交了这个功能的PR。如果您愿意从源代码安装,可以从https://github.com/hrbrmstr/feather安装并:
library(feather)
dat <- data.frame(a = 1:3, b = 4:6)
write_feather(dat, "df.feather", "I am the very model of a modern major general")
str(feather_metadata("df.feather"))
##List of 5
## $ path : chr "df.feather"
## $ dim : int [1:2] 3 2
## $ types : Named chr [1:2] "integer" "integer"
## ..- attr(*, "names")= chr [1:2] "a" "b"
## $ description: chr "I am the very model of a modern major general"
## $ version : int 2
## - attr(*, "class")= chr "feather_metadata"