toSymbols {Rpdb} | R Documentation |
Atomic Symbols Converter
Description
Converts character strings or atomic numbers into atomic symbols.
Usage
toSymbols(x, ...)
## S3 method for class 'integer'
toSymbols(x, ...)
## S3 method for class 'numeric'
toSymbols(x, ...)
## S3 method for class 'character'
toSymbols(x, nletters = 3, ...)
Arguments
x |
a vector to be converted into atomic symbols. |
... |
further arguments passed to or from other methods. |
nletters |
an integer used to truncate the character strings before convertion. |
Details
Each elements of x
are converted into atomic symbols.
When x
is an integer (or numeric) vector, atomic number are search into the elements
data set to find associated atomic symbols.
When x
is a character vector, toSymbols
first removes all leading and trailing white spaces and numbers.
Then translates the first character of the character strings to uppercase and all the others to lowercase.
Finally, the character strings are tested for matching with element symbols provided by the elements
data set.
NA are produced for no matching.
Value
a character vector containing atomic symbols
See Also
Examples
x <- c(1:10)
toSymbols(x)
x <- c("C "," o","h1","1h","UU","SI0","cR")
toSymbols(x)
# 'nletters' can be used to truncate the character strings before
# conversion, if needed:
toSymbols("SIL", nletters=3) # return NA
toSymbols("SIL", nletters=2) # return "Si"
toSymbols("SIL", nletters=1) # return "S"