Set and retrieve the
unit attribute of
x. This can be helpful for documenting the specific meaning of a variable, of an entire data.frame or any other object. For single vectors it can be useful to store the unit.
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a single string describing the object
The label should consist of a single text (length of 1). The text may contain line feeds.
It can be deleted by setting the label to
Unit return the label attribute of x, if any; otherwise, NULL.
Andri Signorell <firstname.lastname@example.org>
A more elaborated label version can be found in package Hmisc
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# add a descriptive label to a variable Label(d.diamonds$colour) <- "The rating scale applied to diamonds ranges from colorless to yellow, as any other color is extremely rare." # technically just appending the text as attribute to the variable attributes(d.diamonds$colour) # label is supported while describing data Desc(d.diamonds$colour) # The label can be deleted by setting it to NULL Label(d.diamonds$colour) <- NULL # Labelling the columns of a data.frame is best done with a loop # (all so far seen *apply aproaches lead to more complicated code...) lbl <- RndWord(16, 7) for(i in seq_along(lbl)) Label(d.pizza[, i]) <- lbl[i] Str(d.pizza)
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