| format {base} | R Documentation |
Format an R object for pretty printing: format.pval is
intended for formatting p-values.
format(x, ...)
format.AsIs(x, width = 12, ...)
format.data.frame(x, ..., justify = "none")
format.default(x, trim = FALSE, digits = getOption("digits"),
justify = c("left", "right", "none"))
format.factor(x, ...)
format.pval(pv, digits = max(1, getOption("digits") - 2),
eps = .Machine$double.eps, na.form = "NA")
x |
any R object (conceptually); typically numeric. |
trim |
logical; if TRUE, leading blanks are trimmed off the
strings. |
digits |
how many significant digits are to be used for
numeric x. This is a suggestion: enough decimal
places will be used so that the smallest (in magnitude) number has
this many significant digits. |
justify |
should character vector be left-justified, right-justified or left alone. When justifying, the field width is that of the longest string. |
pv |
a numeric vector. |
na.form |
character representation of NAs. |
width |
the returned vector has elements of at most width. |
These functions convert their first argument to a vector (or array) of
character strings which have a common format (as is done by
print), fulfilling length(format*(x, *)) ==
length(x). The trimming with trim = TRUE is useful
when the strings are to be used for plot axis annotation.
format.AsIs deals with columns of complicated objects that
have been extracted from a data frame.
format.pval is mainly an auxiliary function for
print.summary.lm etc., does separate formatting for
fixed, floating point and very small values (those < eps).
The function formatC provides a rather more flexible
formatting facility for numbers, but does not provide a common
format for several numbers.
format.data.frame formats the data frame column by column,
applying the appropriate method of format for each column.
The result is a data frame, so in most cases
Currently format drops trailing zeroes, so format(6.001,
digits=2) gives "6" and format(c(6.0, 13.1),
digits=2) gives c(" 6", "13").
Character(s) " in input strings x are escaped to \".
format(1:10)
zz <- data.frame("(row names)"= c("aaaaa", "b"), check.names=FALSE)
format(zz)
format(zz, justify="left")
## handling of quotes
zz <- data.frame(a=I("abc"), b=I("def\"gh"))
format(zz)
p <- c(47,13,2,.1,.023,.0045, 1e-100)/1000
format.pval(p)
format.pval(p / 0.9)
format.pval(p / 0.9, dig=3)