label(x) retrieves the label attribute of x.
label(x) <- "a label" stores the label attribute, and also puts
the class labelled as the first class of x (for S-Plus
this class is not used and methods for handling this class are
not defined so the "label" and "units" attributes are lost
upon subsetting). The reason for having this class is so that the
subscripting method for labelled, [.labelled, can preserve
the label attribute in S. Also, the print
method for labelled objects prefaces the print with the object's
label (and units if there). If the variable is also given
a "units" attribute using the units function, subsetting
the variable (using [.labelled) will also retain the
"units" attribute.
label can optionally append a "units" attribute to the
string, and it can optionally return a string or expression (for R's
plotmath facility) suitable for plotting. labelPlotmath
is a function that also has this function, when the input arguments are
the 'label' and 'units' rather than a vector having those
attributes. When plotmath mode is used to construct labels, the
'label' or 'units' may contain math expressions but they
are typed verbatim if they contain percent signs, blanks, or
underscores. labelPlotmath can optionally create the
expression as a character string, which is useful in building
ggplot commands.
For Surv objects, label first looks to see if there is
an overall "label" attribute for the object, then it looks for
saved attributes that Surv put in the "inputAttributes"
object, looking first at the event variable, then time2,
and finally time. You can restrict the looking by specifying
type.
labelLatex constructs suitable LaTeX labels a variable or from the
label and units arguments, optionally right-justifying
units if hfill=TRUE. This is useful when making tables
when the variable in question is not a column heading. If x
is specified, label and units values are extracted from
its attributes instead of from the other arguments.
Label (actually Label.data.frame) is a function which generates
S source code that makes the labels in all the variables in a data
frame easy to edit.
llist is like list except that it preserves the names or
labels of the component variables in the variables label
attribute. This can be useful when looping over variables or using
sapply or lapply. By using llist instead of
list one can annotate the output with the current variable's name
or label. llist also defines a names attribute for the
list and pulls the names from the arguments' expressions for
non-named arguments.
prList prints a list with element names (without the dollar
sign as in default list printing) and if an element of the list is an
unclassed list with a name, all of those elements are printed, with
titles of the form "primary list name : inner list name". This is
especially useful for Rmarkdown html notebooks when a user-written
function creates multiple html and graphical outputs to all be printed
in a code chunk. Optionally the names can be printed after the
object, and the htmlfig option provides more capabilities when
making html reports. prList does not work for regular html
documents.
putHfig is similar to prList but for a single graphical
object that is rendered with a print method, making it easy to
specify long captions, and short captions for the table of contents in
HTML documents.
Table of contents entries are generated with the short caption, which
is taken as the long caption if there is none. One can optionally not
make a table of contents entry. If argument table=TRUE table
captions will be produced instead. Using expcoll,
markupSpecs html function expcoll will be used to
make tables expand upon clicking an arrow rather than always appear.
putHcap is like putHfig except that it
assumes that users render the graphics or table outside of the
putHcap call. This allows things to work in ordinary html
documents. putHcap does not handle collapsed text.
plotmathTranslate is a simple function that translates certain
character strings to character strings that can be used as part of R
plotmath expressions. If the input string has a space or percent
inside, the string is surrounded by a call to plotmath's
paste function.
as.data.frame.labelled is a utility function that is called by
[.data.frame. It is just a copy of as.data.frame.vector.
data.frame.labelled is another utility function, that adds a
class "labelled" to every variable in a data frame that has a
"label" attribute but not a "labelled" class.
relevel.labelled is a method for preserving labels with the relevel function.
reLabelled is used to add a 'labelled' class back to
variables in data frame that have a 'label' attribute but no 'labelled'
class. Useful for changing cleanup.import()'d S-Plus data
frames back to general form for R and old versions of S-Plus.
label(x, default=NULL, ...)# S3 method for default
label(x, default=NULL, units=plot, plot=FALSE,
grid=FALSE, html=FALSE, ...)
# S3 method for Surv
label(x, default=NULL, units=plot, plot=FALSE,
grid=FALSE, html=FALSE, type=c('any', 'time', 'event'), ...)
# S3 method for data.frame
label(x, default=NULL, self=FALSE, ...)
label(x, ...) <- value
# S3 method for default
label(x, ...) <- value
# S3 method for data.frame
label(x, self=TRUE, ...) <- value
labelPlotmath(label, units=NULL, plotmath=TRUE, html=FALSE, grid=FALSE,
chexpr=FALSE)
labelLatex(x=NULL, label='', units='', size='smaller[2]',
hfill=FALSE, bold=FALSE, default='', double=FALSE)
# S3 method for labelled
print(x, ...) ## or x - calls print.labelled
Label(object, ...)
# S3 method for data.frame
Label(object, file='', append=FALSE, ...)
llist(..., labels=TRUE)
prList(x, lcap=NULL, htmlfig=0, after=FALSE)
putHfig(x, ..., scap=NULL, extra=NULL, subsub=TRUE, hr=TRUE,
table=FALSE, file='', append=FALSE, expcoll=NULL)
putHcap(..., scap=NULL, extra=NULL, subsub=TRUE, hr=TRUE,
table=FALSE, file='', append=FALSE)
plotmathTranslate(x)
data.frame.labelled(object)
# S3 method for labelled
relevel(x, ...)
reLabelled(object)
combineLabels(...)
label returns the label attribute of x, if any; otherwise, "".
label is used
most often for the individual variables in data frames. The function
sas.get copies labels over from SAS if they exist.
sas.get, describe,
extractlabs, hlab
age <- c(21,65,43)
y <- 1:3
label(age) <- "Age in Years"
plot(age, y, xlab=label(age))
data <- data.frame(age=age, y=y)
label(data)
label(data, self=TRUE) <- "A data frame"
label(data, self=TRUE)
x1 <- 1:10
x2 <- 10:1
label(x2) <- 'Label for x2'
units(x2) <- 'mmHg'
x2
x2[1:5]
dframe <- data.frame(x1, x2)
Label(dframe)
labelLatex(x2, hfill=TRUE, bold=TRUE)
labelLatex(label='Velocity', units='m/s')
##In these examples of llist, note that labels are printed after
##variable names, because of print.labelled
a <- 1:3
b <- 4:6
label(b) <- 'B Label'
llist(a,b)
llist(a,b,d=0)
llist(a,b,0)
w <- llist(a, b>5, d=101:103)
sapply(w, function(x){
hist(as.numeric(x), xlab=label(x))
# locator(1) ## wait for mouse click
})
# Or: for(u in w) {hist(u); title(label(u))}
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