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add_variables()
adds a new column to a data frame, while
add_case()
adds a new row to a data frame. These are convenient
functions to add columns or rows not only at the end of a data frame,
but at any column or row position. Furthermore, they allow easy integration
into a pipe-workflow.
add_variables(data, ..., .after = Inf, .before = NULL)add_case(data, ..., .after = Inf, .before = NULL)
A data frame.
One or more named vectors that indicate the variables or values,
which will be added as new column or row to data
. For add_case()
,
non-matching columns in data
will be filled with NA
.
Numerical index of row or column, where after or before
the new variable or case should be added. If .after = -1
, variables
or cases are added at the beginning; if .after = Inf
,
variables and cases are added at the end. In case of add_variables()
,
.after
and .before
may also be a character name indicating
the column in data
, after or infront of what ...
should be
inserted.
data
, including the new variables or cases from ...
.
# NOT RUN {
d <- data.frame(
a = c(1, 2, 3),
b = c("a", "b", "c"),
c = c(10, 20, 30),
stringsAsFactors = FALSE
)
add_case(d, b = "d")
add_case(d, b = "d", a = 5, .before = 1)
# adding a new case for a new variable
add_case(d, e = "new case")
add_variables(d, new = 5)
add_variables(d, new = c(4, 4, 4), new2 = c(5, 5, 5), .after = "b")
# }
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