format.info
format(.) Information
Description
Information is returned on how format(x, digits, nsmall)
would be formatted.
Usage
format.info(x, digits = NULL, nsmall = 0)
Arguments
x | an atomic vector; a potential argument of |
digits | how many significant digits are to be used for numeric and complex |
nsmall | (see |
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 |
r[2] | number of digits after decimal point. |
r[3] | in |
For a complex vector the first three elements refer to the real parts, and there are three further elements corresponding to the imaginary parts.
See Also
format
(notably about digits >= 16
), formatC
.
Examples
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)
Copyright (©) 1999–2012 R Foundation for Statistical Computing.
Licensed under the GNU General Public License.