slice

  1. Method call format
  2. Parameters
  3. Type of return value
  4. Usage examples

Form a slice of the input dataset from the given list of object indices.

Method call format

slice(rindex)

Parameters

ParameterPossible typesDescriptionDefault value
rindex
  • list
  • numpy.array

The indices of objects to form the slice of the dataset from.

Required parameter
ParameterPossible typesDescriptionDefault value
rindex
  • list
  • numpy.array

The indices of objects to form the slice of the dataset from.

Required parameter

Type of return value

catboost.Pool

Usage examples

Get a slice of five objects from the input dataset:
from catboost import Pool

train_data = [[1,3],
              [0,4],
              [1,7],
              [6,4],
              [5,3]]

input_pool = Pool(train_data)
print input_pool.num_row()

pool_part = input_pool.slice([0,1,2])
print pool_part.num_row()
Output:
5
3