I would also like to see the package for lumsdainne and pappel unit root test in R too.. But I think for now, its only available in RATS, Eviews and possibly Gauss.. The other alternative which you can see for R is he Lee-Stracizich test which is equally similar to LP test .You can get it from github

See: https://www.google.com/search?client=firefox-b-1-d&ei=p7LBX7_eM8fy5gK7yr7IDg&q=Unit+Root+tests+in+R&oq=Unit+Root+tests+in+R&gs_lcp=CgZwc3ktYWIQAzIFCAAQyQMyBggAEBYQHjIGCAAQFhAeMgYIABAWEB4yBggAEBYQHjIICAAQFhAKEB46BAgAEEc6AggAOg4IABDqAhC0AhCaARDlAjoFCAAQkQI6CAgAELEDEIMBOg4ILhCxAxCDARDHARCjAjoFCAAQsQM6CwguELEDEMcBEKMCOggIABDJAxCRAjoECAAQQzoKCC4QxwEQrwEQQzoHCAAQyQMQQzoHCAAQsQMQQzoECAAQClDJo3ZY7v12YK6Id2gBcAF4BIABygKIAasnkgEHNC44LjguNZgBAKABAaoBB2d3cy13aXqwAQbIAQjAAQE&sclient=psy-ab&ved=0ahUKEwj_zcbClaTtAhVHuVkKHTulD-kQ4dUDCAw&uact=5

D. Booth

Dear Savio Oliveira As an alternative you can use augmented Dickey–Fuller test which is included in IBM SPSS.

Thank you all for the helpful comments.