Resample (p.irmin-bench.3.6.1.doc.irmin-bench.traces.Irmin_traces.Trace_stat_summary

Module Trace_stat_summary_utils.ResampleSource

This Resample module offers 3 ways to resample a 1d vector:

At the lowest level, using should_sample.

Using create_acc / accumulate / finalise.

At the highest level, using resample_vector.

Both downsampling and upsampling are possible:

The first and last point of the input and output sequences are always equal.

Source

val should_sample : 
  i0:int ->
  len0:int ->
  i1:int ->
  len1:int ->
  [ `After | `Before | `Inside of float | `Out_of_bounds ]

When resampling a 1d vector from len0 to len1, this function locates a destination point with index i1 relative to the range i0 - 1 excluded and i0 included.

When both i0 and i1 equal 0, the result is `Inside 1..

len0 and len1 should be greater or equal to 2.

Sourcetype acc

Source

val create_acc : 
  [ `Interpolate | `Next_neighbor ] ->
  len0:int ->
  len1:int ->
  v00:float ->
  acc

Creates a resampling accumulator.

Requires the first point of vec0.

Sourceval accumulate : acc -> float -> acc

Sourceval finalise : acc -> curve

Source

val resample_vector : 
  [< `Interpolate | `Next_neighbor ] ->
  curve ->
  int ->
  curve

resample_vector mode vec0 len1 is vec1, a curve of length len1, created by resampling vec0.

It internally relies on the should_sample function.