Zhengtao xiao

Hi, the same problem happened to me. I think only the new version(0.09) have this problem. I tried the old one (v0.07), it worked well.

@Vivianstats Hi Vivian, this error might be raised when there are NA or empty values in the input file. It would be very helpful if you could add a function...

This function is defined in "utils.R", you can load it by using `source("utils.R")`