Tong He 170b349f3e Fix the "No visible binding" CRAN checks (#1504)
* fix cran check

* change required R version because of utils::globalVariables
2016-08-26 10:24:04 -07:00
..
2016-08-20 05:09:03 -05:00
2016-06-27 01:58:03 -05:00