# format.info

0th

Percentile

##### format(.) Information

Information is returned on how format(x, digits, nsmall) would be formatted.

Keywords
programming, print, character
##### Usage
format.info(x, digits = NULL, nsmall = 0)
##### Arguments
x

an atomic vector; a potential argument of format(x, …).

digits

how many significant digits are to be used for numeric and complex x. The default, NULL, uses getOption("digits").

nsmall

(see format(…, nsmall)).

##### Value

An integer vector of length 1, 3 or 6, say r.

For logical, integer and character vectors a single element, the width which would be used by format if width = NULL.

For numeric vectors:

r[1]

width (in characters) used by format(x)

r[2]

number of digits after decimal point.

r[3]

in 0:2; if $\ge$1, exponential representation would be used, with exponent length of r[3]+1.

For a complex vector the first three elements refer to the real parts, and there are three further elements corresponding to the imaginary parts.

format (notably about digits >= 16), formatC.
library(base) # NOT RUN { dd <- options("digits") ; options(digits = 7) #-- for the following format.info(123) # 3 0 0 format.info(pi) # 8 6 0 format.info(1e8) # 5 0 1 - exponential "1e+08" format.info(1e222) # 6 0 2 - exponential "1e+222" x <- pi*10^c(-10,-2,0:2,8,20) names(x) <- formatC(x, width = 1, digits = 3, format = "g") cbind(sapply(x, format)) t(sapply(x, format.info)) ## using at least 8 digits right of "." t(sapply(x, format.info, nsmall = 8)) # Reset old options: options(dd) # }