filter_nonrankings_exp3: function that evaluates nonranking methods
In jakubkala/QuiPTsim:

function that evaluates nonranking methods

filter_nonrankings_exp3(
  paths,
  num_reps,
  num_matrices_to_rbind,
  output_prefix,
  feature_selection_method,
  n,
  fraction,
  validation_scheme,
  thresholds = NULL
)

`paths`	list of paths containing n-gram matrices
`num_reps`	number of repetitions of an experiment
`num_matrices_to_rbind`	number of matrices to bind in order to perform exp III correctly
`output_prefix`	output files directory
`feature_selection_method`	filter (e.g. QuiPT)
`n`	number of total sequences
`fraction`	fraction of positive examples
`validation_scheme`	list with ranking details
`thresholds`	p-value thresholds for statistical tests