`write_plink` fails when .bed table has column names with whitespace, suggest to trim the column names

[richelbilderbeek]

Dear genio maintainers,

Thanks for genio and its many tests.

Here, I can only give a partial report, but I am willing to make a complete one.

When I use PLINK to convert PLINK text files to PLINK binary files, the column names get whitespace added when there are more than 9 entries.

This is a problem when doing write_plink:

 Error in genio::write_plink(file = base_input_filename, X = bed_table,  : 
  Column names in genotype matrix do not agree with FAM `id` column! 

I enjoy the strict checking, yet in this case it is noise. I suggest to compare the trimmed column names with the .fam table's id column.

There is an obvious workaround; before I call genio::write_plink, one can use ...

colnames(bed_table) <- stringr::str_trim(colnames(bed_table))

... but I feel this should be in genio instead, as genio is a great package :-)