compress: Compress or Expand Data Frames
| compress | R Documentation |
Compress or Expand Data Frames
Description
Function to remove or restore redundant or empty elements from a data object.
Usage
compress(x, ...)
## S3 method for class 'data.frame'
compress(x, keep = "", na.rm = TRUE, remove = "", unique = FALSE, ...)
expand(x, ...)
## S3 method for class 'data.frame'
expand(x, keep, ...)
Arguments
x |
Data object. |
... |
Not used. |
keep |
Data object. |
na.rm |
Logical value specifying whether to remove columns containing only NA values. columns containing only NA values. |
remove |
Character string(s) specifying other column contents to be treated as empty. |
unique |
Logical value specifying whether to remove columns that contain only a single unique value. |
Methods (by class)
-
compress(data.frame): Remove empty data columns.
Examples
x <- data.frame(year = 2018, count = rpois(10, 5), survey = "scs", group = rep(1:2, each = 5))
x <- compress(x)
print(x)
attributes(x)
attr(x, "status") <- "critical"
expand(x)
attr(x, "units") <- c(length = "millimeters", weight = "grams")
expand(x)
