| dec2base {ds4psy} | R Documentation |
Convert an integer from decimal notation into a string of numeric digits in some base.
Description
dec2base converts an integer from its standard decimal notation
(i.e., using positional numerals with a base or radix of 10)
into a sequence of numeric symbols (digits) in some other base.
Usage
dec2base(x, base = 2)
Arguments
x |
A (required) integer in decimal (base 10) notation or corresponding string of digits (i.e., digits 0-9). |
base |
The base or radix of the digits in the output.
Default: |
Details
See base_digits for the sequence of default digits.
To prevent erroneous interpretations of numeric outputs,
dec2base returns a sequence of digits (as a character string).
dec2base is the complement of base2dec.
Value
A character string of digits (in base notation).
See Also
base2dec converts numerals in some base into decimal numbers;
as.roman converts integers into Roman numerals.
Other numeric functions:
base2dec(),
base_digits,
is_equal(),
is_wholenumber(),
num_as_char(),
num_as_ordinal(),
num_equal()
Other utility functions:
base2dec(),
base_digits,
is_equal(),
is_vect(),
is_wholenumber(),
num_as_char(),
num_as_ordinal(),
num_equal()
Examples
# (a) single numeric input:
dec2base(3) # base = 2
dec2base(8, base = 2)
dec2base(8, base = 3)
dec2base(8, base = 7)
dec2base(100, base = 5)
dec2base(100, base = 10)
dec2base(100, base = 15)
dec2base(14, base = 14)
dec2base(15, base = 15)
dec2base(16, base = 16)
dec2base(15, base = 16)
dec2base(31, base = 16)
dec2base(47, base = 16)
# (b) single string input:
dec2base("7", base = 2)
dec2base("8", base = 3)
# Extreme values:
dec2base(base2dec(rep("1", 32))) # 32 x "1"
dec2base(base2dec(c("1", rep("0", 32)))) # 2^32
dec2base(base2dec(rep("1", 33))) # 33 x "1"
dec2base(base2dec(c("1", rep("0", 33)))) # 2^33
# Non-standard inputs:
dec2base(" ") # only spaces: NA
dec2base("?") # no decimal digits: NA
dec2base(" 10 ", 2) # remove leading and trailing spaces
dec2base("-10", 2) # handle negative inputs (in character strings)
dec2base(" -- 10", 2) # handle multiple negations
dec2base("xy -10 ", 2) # ignore non-decimal digit prefixes
# Note:
base2dec(dec2base(012340, base = 9), base = 9)
dec2base(base2dec(043210, base = 11), base = 11)