The characters R stores for the content of a string literal, with its escapes undone as R's parser undoes them:
a\tb is three characters. It is undefined where R rejects the literal (an unknown escape such as \., a nul)
or stores a byte no character stands for (\xff).
The characters R stores for the content of a string literal, with its escapes undone as R's parser undoes them:
a\tbis three characters. It isundefinedwhere R rejects the literal (an unknown escape such as\., a nul) or stores a byte no character stands for (\xff).