baRcodeR 0.1.2 is released on CRAN today!
Download and install by
install.packages("baRcodeR") Example linear barcode
The major feature of this release is the ability to print linear (a.k.a normal) barcodes through specifying type = "linear" in create_PDF() rather than type = "matrix" which prints the usual QR code.
The github repository is at yihanwu/baRcodeR.
Minor notes on the implementation of these linear barcodes The linear barcodes are based on the code 128B specification (Wikipedia).