Test, convert numbers
Test, convert numbers
allDigits( str, base=10 ) isNumeric(str) str2dig( str )
str |
Vector of strings |
base |
Integer, base of number representation used in |
allDigits The strings contain digits only which are allowable in base 'base'.isNumeric Test whether the elements of a character vector
represent legal numbers only.str2dig Convert a string to a vector of integers.
Christian W. Hoffmann <christian@echoffmann.ch>
allDigits(c("1231","89a8742")) # TRUE FALSE
isNumeric(c("1231","8.9e-2",".7d2")) # [1] TRUE TRUE FALSE
str2dig("13245.") # 1 3 2 4 5 NA
# for comparison, big numbers:
int(10^(7:10)) # 10000000 100000000 1000000000 NAPlease choose more modern alternatives, such as Google Chrome or Mozilla Firefox.