On Tue, Jun 2, 2015 at 12:15 PM, <Atteyet-Alla.Yassin at ukb.uni-bonn.de> wrote: > would you please write it as attachment. Every time I copied it received > error message Line wrapped code is annoying, but so are attachments on mailing lists :( Try: https://gist.github.com/peterjc/bf6796adbc9e7737bff6 Peter