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Datasets @ APEX Lab

ANNOUNCEMENT

This dataset is a standard version of indexed iPinyou/criteo dataset (threshold chosen) ONLY IN APEX LAB.

Usage

At the very beginning, run command echo NASPATH > .naspath where NASPATH here is the mounted path of NAS.

Python package apexdsets

Use

import sys
sys.path.append("REPOSITORY")
import apexdsets

to import package apexdsets, where "REPOSITORY" here represents the path of this repository. <br/>

Method: datapath(dataname)

Return the absolute file path given the name of the dataset (dataname). <br/>

Class: apexdsets.CTRLoader

Method: __init__(datapath)

Constructor. Example:

loader = CTRLoader(datapath("ipinyou"))

Method: meta(key)

Args:

• key: the key of the meta information.
  • "names" for the names of fields.
  • "sizes" for the sizes of fields.
  • "dtypes" for the data types of fields, including
    • "num" for numerical field,
    • "cate" for categorical field.
  • "index2cate" for the maps of fields from their indices to the original categories.
  • "cate2index" for the maps of fields from their original categories to the indices. (This option is invalid for criteo dataset)

Returns: A python object (usually a list) for the meta information of key key. <br/>

Method: data_generator(dsetname, batch_size, unified_index=True)

To get a generator, yielding data in pair (inputs, labels).

Args:

• dsetname: the name of the dataset, usually
  • "train",
  • "test".
• batch_size: the size of a batch.
• unified_index: which represents whether to unify all index. If false, all fields will have its own index, starting from 0.

Returns: A generator for data packed in batches. <br/>

Property: unified_size

A value representing the total number of categories across all categorical fields

iPinyou

Threshold chosen: 5

Fields:

• The first one represents click-or-not
• Other 28 fields are categorical

Original dataset includes:

• 15395258 samples in the training set
• 4100716 samples in the test set

Positive samples over total samples: 0.075%.

criteo

Threshold chosen: 20

Use day_6.gz to day_12.gz as training set, day_13.gz as test set.

Negative-down sampling used, positive samples over total samples: 50%.