Skip to main content

Primer file types

Whether the extensions *.pri, *.xls(x) etc display, or not, is a function of your Windows set-up; if you have suppressed them it is still easy to distinguish the different file types by their icon. There are PRIMER 7-specific icons and extensions for the following:

  • (*.pri) sample data in rectangular format, and associated factors, description etc;
  • (*.sid) triangular matrices of similarity, dissimilarity, distance (generically, resemblances);
  • (*.agg) aggregation file, assigning species to genera to families etc;
  • (*.ppl) plot files, holding all the internal PRIMER information that structures the plot;
  • (*.pwk) workspace files of everything, so the PRIMER desktop can be reconstructed ‘as was’;
  • [ (*.pdd) design files – these are only used in the separate PERMANOVA+ routines which are an add-on to the PRIMER software, see the separate PERMANOVA+ User Manual].