如何设置将在函数中使用 {dplyr} 过滤的行数?
how to set the number of lines that will be filtered with {dplyr} in a function?
在 R 函数中,如何设置将使用 {dplyr} 过滤的行数?
这是我的例子。
非常感谢!
library(dplyr)
myfunction <- function(base,
start_row=1,
end_row=Inf) {
base %>% slice(start_row:end_row)
}
result <- myfunction(base=iris,
start_row = 1,
end_row = 50)
# => works
result <- myfunction()
# Error in start_row:end_row : result would be too long a vector
如评论中所述,默认使用nrow(base)
:
myfunction <- function(base,
start_row = 1,
end_row = nrow(base)) {
base %>%
slice(start_row:end_row)
}
输出
dim(myfunction(iris))
#[1] 150 5
在 R 函数中,如何设置将使用 {dplyr} 过滤的行数?
这是我的例子。 非常感谢!
library(dplyr)
myfunction <- function(base,
start_row=1,
end_row=Inf) {
base %>% slice(start_row:end_row)
}
result <- myfunction(base=iris,
start_row = 1,
end_row = 50)
# => works
result <- myfunction()
# Error in start_row:end_row : result would be too long a vector
如评论中所述,默认使用nrow(base)
:
myfunction <- function(base,
start_row = 1,
end_row = nrow(base)) {
base %>%
slice(start_row:end_row)
}
输出
dim(myfunction(iris))
#[1] 150 5