CopyAttributes | R Documentation |
Copies attributes such as "label", "name", "question" and "questiontype" from one object to another. If both objects are lists (data frames), elements (columns) in the recipient list (data frame) will also receive attributes from elements (columns) with the same name in the donor list (data frame). The function is recursive, and will copy attributes when the inputs are nested lists.
CopyAttributes(
data.without.attributes,
data.with.attributes,
attr.to.not.copy = c("dimnames", "names", "row.names", "dim", "class", "levels")
)
data.without.attributes |
an object to receive attributes from, such as a data.frame, list, or matrix |
data.with.attributes |
an object to copy attributes from |
attr.to.not.copy |
character vector of attribute names appearing in
|
In the case when both arguments are data frames, any attributes
in the columns of data.with.attributes
will also be copied to
data.without.attributes
excluding class
and levels
Names are used when copying attributes in each component. Nothing will be
copied for the case of lists with NULL
names attribute.
In the case when data.without.attributes
is not a data frame
and data.with.attributes
is a data frame, the
attributes of data.with.attributes
are copied over to
data.without.attributes
and the columns are not changed.
Similarly, if data.without.attributes
is a data frame and
and data.with.attributes
is not a data frame the
attributes of data.with.attributes
are copied over to
data.without.attributes
and the columns are also not changed.
A copy of data.without.attributes
with all the attributes
of data.with.attributes
.
v1 <- 1:10
v2 <- 11:20
attr(v1, "label") <- "label for v1"
CopyAttributes(v2, v1) # returns v2 with the label attribute from v1
df1 <- data.frame(a = 1:10, b = 11:20)
df2 <- data.frame(a = 21:30, b = 31:40)
attr(df1, "label") <- "label for df1"
attr(df1$a, "label") <- "label for column a of df1"
attr(df1$b, "label") <- "label for column b of df1"
CopyAttributes(df2, df1) # returns df2 with label attributes (including column attributes) from df1
CopyAttributes(df2, v1) # returns df2 with label attribute from v1 (columns not changed)
CopyAttributes(v2, df1) # returns v2 with label attribute from df1 (columns not changed)
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