Hetero Feature Binning¶
Feature binning or data binning is a data pre-processing technique. It can be use to reduce the effects of minor observation errors, calculate information values and so on.
Currently, we provide quantile binning and bucket binning methods. To achieve quantile binning approach, we have used a special data structure mentioned in this paper. Feel free to check out the detail algorithm in the paper.
As for calculating the federated iv and woe values, the following figure can describe the principle properly.
As the figure shows, B party which has the data labels encrypt its labels with Addiction homomorphic encryption and then send to A. A static each bin's label sum and send back. Then B can calculate woe and iv base on the given information.
For multiple hosts, it is similar with one host case. Guest sends its encrypted label information to all hosts, and each of the hosts calculates and sends back the static info.
For optimal binning, each party use quantile binning or bucket binning find initial split points. Then Guest will send encrypted labels to Host. Host use them calculate histogram of each bin and send back to Guest. Then start optimal binning methods.
There exist two kinds of methods, merge-optimal binning and split-optimal binning. When choosing metrics as iv, gini or chi-square, merge type optimal binning will be used. On the other hand, if ks is choosed, split type optimal binning will be used.
Binning module supports multi-class data to calculate iv and woe too. To achieve it, one-vs-rest mechanism is used. Each label will be chosen iteratively as event case. All other cases will be treated as non-event cases. Therefore, we can obtain a set of iv\&woe result for each label case.
Param¶
feature_binning_param
¶
Classes¶
TransformParam (BaseParam)
¶
Define how to transfer the cols
Parameters:
Name | Type | Description | Default |
---|---|---|---|
transform_cols |
list of column index, default: -1 |
Specify which columns need to be transform. If column index is None, None of columns will be transformed. If it is -1, it will use same columns as cols in binning module. |
-1 |
transform_names |
list of string, default: [] |
Specify which columns need to calculated. Each element in the list represent for a column name in header. |
None |
transform_type |
{'bin_num', 'woe', None} |
Specify which value these columns going to replace. 1. bin_num: Transfer original feature value to bin index in which this value belongs to. 2. woe: This is valid for guest party only. It will replace original value to its woe value 3. None: nothing will be replaced. |
'bin_num' |
Source code in federatedml/param/feature_binning_param.py
class TransformParam(BaseParam):
"""
Define how to transfer the cols
Parameters
----------
transform_cols : list of column index, default: -1
Specify which columns need to be transform. If column index is None, None of columns will be transformed.
If it is -1, it will use same columns as cols in binning module.
transform_names: list of string, default: []
Specify which columns need to calculated. Each element in the list represent for a column name in header.
transform_type: {'bin_num', 'woe', None}
Specify which value these columns going to replace.
1. bin_num: Transfer original feature value to bin index in which this value belongs to.
2. woe: This is valid for guest party only. It will replace original value to its woe value
3. None: nothing will be replaced.
"""
def __init__(self, transform_cols=-1, transform_names=None, transform_type="bin_num"):
super(TransformParam, self).__init__()
self.transform_cols = transform_cols
self.transform_names = transform_names
self.transform_type = transform_type
def check(self):
descr = "Transform Param's "
if self.transform_cols is not None and self.transform_cols != -1:
self.check_defined_type(self.transform_cols, descr, ['list'])
self.check_defined_type(self.transform_names, descr, ['list', "NoneType"])
if self.transform_names is not None:
for name in self.transform_names:
if not isinstance(name, str):
raise ValueError("Elements in transform_names should be string type")
self.check_valid_value(self.transform_type, descr, ['bin_num', 'woe', None])
__init__(self, transform_cols=-1, transform_names=None, transform_type='bin_num')
special
¶Source code in federatedml/param/feature_binning_param.py
def __init__(self, transform_cols=-1, transform_names=None, transform_type="bin_num"):
super(TransformParam, self).__init__()
self.transform_cols = transform_cols
self.transform_names = transform_names
self.transform_type = transform_type
check(self)
¶Source code in federatedml/param/feature_binning_param.py
def check(self):
descr = "Transform Param's "
if self.transform_cols is not None and self.transform_cols != -1:
self.check_defined_type(self.transform_cols, descr, ['list'])
self.check_defined_type(self.transform_names, descr, ['list', "NoneType"])
if self.transform_names is not None:
for name in self.transform_names:
if not isinstance(name, str):
raise ValueError("Elements in transform_names should be string type")
self.check_valid_value(self.transform_type, descr, ['bin_num', 'woe', None])
OptimalBinningParam (BaseParam)
¶
Indicate optimal binning params
Parameters:
Name | Type | Description | Default |
---|---|---|---|
metric_method |
str, default: "iv" |
The algorithm metric method. Support iv, gini, ks, chi-square |
'iv' |
min_bin_pct |
float, default: 0.05 |
The minimum percentage of each bucket |
0.05 |
max_bin_pct |
float, default: 1.0 |
The maximum percentage of each bucket |
1.0 |
init_bin_nums |
int, default 100 |
Number of bins when initialize |
1000 |
mixture |
bool, default: True |
Whether each bucket need event and non-event records |
True |
init_bucket_method |
str default: quantile |
Init bucket methods. Accept quantile and bucket. |
'quantile' |
Source code in federatedml/param/feature_binning_param.py
class OptimalBinningParam(BaseParam):
"""
Indicate optimal binning params
Parameters
----------
metric_method: str, default: "iv"
The algorithm metric method. Support iv, gini, ks, chi-square
min_bin_pct: float, default: 0.05
The minimum percentage of each bucket
max_bin_pct: float, default: 1.0
The maximum percentage of each bucket
init_bin_nums: int, default 100
Number of bins when initialize
mixture: bool, default: True
Whether each bucket need event and non-event records
init_bucket_method: str default: quantile
Init bucket methods. Accept quantile and bucket.
"""
def __init__(self, metric_method='iv', min_bin_pct=0.05, max_bin_pct=1.0,
init_bin_nums=1000, mixture=True, init_bucket_method='quantile'):
super().__init__()
self.init_bucket_method = init_bucket_method
self.metric_method = metric_method
self.max_bin = None
self.mixture = mixture
self.max_bin_pct = max_bin_pct
self.min_bin_pct = min_bin_pct
self.init_bin_nums = init_bin_nums
self.adjustment_factor = None
def check(self):
descr = "hetero binning's optimal binning param's"
self.check_string(self.metric_method, descr)
self.metric_method = self.metric_method.lower()
if self.metric_method in ['chi_square', 'chi-square']:
self.metric_method = 'chi_square'
self.check_valid_value(self.metric_method, descr, ['iv', 'gini', 'chi_square', 'ks'])
self.check_positive_integer(self.init_bin_nums, descr)
self.init_bucket_method = self.init_bucket_method.lower()
self.check_valid_value(self.init_bucket_method, descr, ['quantile', 'bucket'])
if self.max_bin_pct not in [1, 0]:
self.check_decimal_float(self.max_bin_pct, descr)
if self.min_bin_pct not in [1, 0]:
self.check_decimal_float(self.min_bin_pct, descr)
if self.min_bin_pct > self.max_bin_pct:
raise ValueError("Optimal binning's min_bin_pct should less or equal than max_bin_pct")
self.check_boolean(self.mixture, descr)
self.check_positive_integer(self.init_bin_nums, descr)
__init__(self, metric_method='iv', min_bin_pct=0.05, max_bin_pct=1.0, init_bin_nums=1000, mixture=True, init_bucket_method='quantile')
special
¶Source code in federatedml/param/feature_binning_param.py
def __init__(self, metric_method='iv', min_bin_pct=0.05, max_bin_pct=1.0,
init_bin_nums=1000, mixture=True, init_bucket_method='quantile'):
super().__init__()
self.init_bucket_method = init_bucket_method
self.metric_method = metric_method
self.max_bin = None
self.mixture = mixture
self.max_bin_pct = max_bin_pct
self.min_bin_pct = min_bin_pct
self.init_bin_nums = init_bin_nums
self.adjustment_factor = None
check(self)
¶Source code in federatedml/param/feature_binning_param.py
def check(self):
descr = "hetero binning's optimal binning param's"
self.check_string(self.metric_method, descr)
self.metric_method = self.metric_method.lower()
if self.metric_method in ['chi_square', 'chi-square']:
self.metric_method = 'chi_square'
self.check_valid_value(self.metric_method, descr, ['iv', 'gini', 'chi_square', 'ks'])
self.check_positive_integer(self.init_bin_nums, descr)
self.init_bucket_method = self.init_bucket_method.lower()
self.check_valid_value(self.init_bucket_method, descr, ['quantile', 'bucket'])
if self.max_bin_pct not in [1, 0]:
self.check_decimal_float(self.max_bin_pct, descr)
if self.min_bin_pct not in [1, 0]:
self.check_decimal_float(self.min_bin_pct, descr)
if self.min_bin_pct > self.max_bin_pct:
raise ValueError("Optimal binning's min_bin_pct should less or equal than max_bin_pct")
self.check_boolean(self.mixture, descr)
self.check_positive_integer(self.init_bin_nums, descr)
FeatureBinningParam (BaseParam)
¶
Define the feature binning method
Parameters:
Name | Type | Description | Default |
---|---|---|---|
method |
str, 'quantile', 'bucket' or 'optimal', default: 'quantile' |
Binning method. |
'quantile' |
compress_thres |
int, default: 10000 |
When the number of saved summaries exceed this threshold, it will call its compress function |
10000 |
head_size |
int, default: 10000 |
The buffer size to store inserted observations. When head list reach this buffer size, the QuantileSummaries object start to generate summary(or stats) and insert into its sampled list. |
10000 |
error |
float, 0 <= error < 1 default: 0.001 |
The error of tolerance of binning. The final split point comes from original data, and the rank of this value is close to the exact rank. More precisely, floor((p - 2 * error) * N) <= rank(x) <= ceil((p + 2 * error) * N) where p is the quantile in float, and N is total number of data. |
0.0001 |
bin_num |
int, bin_num > 0, default: 10 |
The max bin number for binning |
10 |
bin_indexes |
list of int or int, default: -1 |
Specify which columns need to be binned. -1 represent for all columns. If you need to indicate specific cols, provide a list of header index instead of -1. |
-1 |
bin_names |
list of string, default: [] |
Specify which columns need to calculated. Each element in the list represent for a column name in header. |
None |
adjustment_factor |
float, default: 0.5 |
the adjustment factor when calculating WOE. This is useful when there is no event or non-event in a bin. Please note that this parameter will NOT take effect for setting in host. |
0.5 |
category_indexes |
list of int or int, default: [] |
Specify which columns are category features. -1 represent for all columns. List of int indicate a set of such features. For category features, bin_obj will take its original values as split_points and treat them as have been binned. If this is not what you expect, please do NOT put it into this parameters. The number of categories should not exceed bin_num set above. |
None |
category_names |
list of string, default: [] |
Use column names to specify category features. Each element in the list represent for a column name in header. |
None |
local_only |
bool, default: False |
Whether just provide binning method to guest party. If true, host party will do nothing. Warnings: This parameter will be deprecated in future version. |
False |
transform_param |
TransformParam |
Define how to transfer the binned data. |
<federatedml.param.feature_binning_param.TransformParam object at 0x7f7edae74550> |
need_run |
bool, default True |
Indicate if this module needed to be run |
True |
skip_static |
bool, default False |
If true, binning will not calculate iv, woe etc. In this case, optimal-binning will not be supported. |
False |
Source code in federatedml/param/feature_binning_param.py
class FeatureBinningParam(BaseParam):
"""
Define the feature binning method
Parameters
----------
method : str, 'quantile', 'bucket' or 'optimal', default: 'quantile'
Binning method.
compress_thres: int, default: 10000
When the number of saved summaries exceed this threshold, it will call its compress function
head_size: int, default: 10000
The buffer size to store inserted observations. When head list reach this buffer size, the
QuantileSummaries object start to generate summary(or stats) and insert into its sampled list.
error: float, 0 <= error < 1 default: 0.001
The error of tolerance of binning. The final split point comes from original data, and the rank
of this value is close to the exact rank. More precisely,
floor((p - 2 * error) * N) <= rank(x) <= ceil((p + 2 * error) * N)
where p is the quantile in float, and N is total number of data.
bin_num: int, bin_num > 0, default: 10
The max bin number for binning
bin_indexes : list of int or int, default: -1
Specify which columns need to be binned. -1 represent for all columns. If you need to indicate specific
cols, provide a list of header index instead of -1.
bin_names : list of string, default: []
Specify which columns need to calculated. Each element in the list represent for a column name in header.
adjustment_factor : float, default: 0.5
the adjustment factor when calculating WOE. This is useful when there is no event or non-event in
a bin. Please note that this parameter will NOT take effect for setting in host.
category_indexes : list of int or int, default: []
Specify which columns are category features. -1 represent for all columns. List of int indicate a set of
such features. For category features, bin_obj will take its original values as split_points and treat them
as have been binned. If this is not what you expect, please do NOT put it into this parameters.
The number of categories should not exceed bin_num set above.
category_names : list of string, default: []
Use column names to specify category features. Each element in the list represent for a column name in header.
local_only : bool, default: False
Whether just provide binning method to guest party. If true, host party will do nothing.
Warnings: This parameter will be deprecated in future version.
transform_param: TransformParam
Define how to transfer the binned data.
need_run: bool, default True
Indicate if this module needed to be run
skip_static: bool, default False
If true, binning will not calculate iv, woe etc. In this case, optimal-binning
will not be supported.
"""
def __init__(self, method=consts.QUANTILE,
compress_thres=consts.DEFAULT_COMPRESS_THRESHOLD,
head_size=consts.DEFAULT_HEAD_SIZE,
error=consts.DEFAULT_RELATIVE_ERROR,
bin_num=consts.G_BIN_NUM, bin_indexes=-1, bin_names=None, adjustment_factor=0.5,
transform_param=TransformParam(),
local_only=False,
category_indexes=None, category_names=None,
need_run=True, skip_static=False):
super(FeatureBinningParam, self).__init__()
self.method = method
self.compress_thres = compress_thres
self.head_size = head_size
self.error = error
self.adjustment_factor = adjustment_factor
self.bin_num = bin_num
self.bin_indexes = bin_indexes
self.bin_names = bin_names
self.category_indexes = category_indexes
self.category_names = category_names
self.transform_param = copy.deepcopy(transform_param)
self.need_run = need_run
self.skip_static = skip_static
self.local_only = local_only
def check(self):
descr = "Binning param's"
self.check_string(self.method, descr)
self.method = self.method.lower()
self.check_positive_integer(self.compress_thres, descr)
self.check_positive_integer(self.head_size, descr)
self.check_decimal_float(self.error, descr)
self.check_positive_integer(self.bin_num, descr)
if self.bin_indexes != -1:
self.check_defined_type(self.bin_indexes, descr, ['list', 'RepeatedScalarContainer', "NoneType"])
self.check_defined_type(self.bin_names, descr, ['list', "NoneType"])
self.check_defined_type(self.category_indexes, descr, ['list', "NoneType"])
self.check_defined_type(self.category_names, descr, ['list', "NoneType"])
self.check_open_unit_interval(self.adjustment_factor, descr)
self.check_boolean(self.local_only, descr)
__init__(self, method='quantile', compress_thres=10000, head_size=10000, error=0.0001, bin_num=10, bin_indexes=-1, bin_names=None, adjustment_factor=0.5, transform_param=<federatedml.param.feature_binning_param.TransformParam object at 0x7f7edae74550>, local_only=False, category_indexes=None, category_names=None, need_run=True, skip_static=False)
special
¶Source code in federatedml/param/feature_binning_param.py
def __init__(self, method=consts.QUANTILE,
compress_thres=consts.DEFAULT_COMPRESS_THRESHOLD,
head_size=consts.DEFAULT_HEAD_SIZE,
error=consts.DEFAULT_RELATIVE_ERROR,
bin_num=consts.G_BIN_NUM, bin_indexes=-1, bin_names=None, adjustment_factor=0.5,
transform_param=TransformParam(),
local_only=False,
category_indexes=None, category_names=None,
need_run=True, skip_static=False):
super(FeatureBinningParam, self).__init__()
self.method = method
self.compress_thres = compress_thres
self.head_size = head_size
self.error = error
self.adjustment_factor = adjustment_factor
self.bin_num = bin_num
self.bin_indexes = bin_indexes
self.bin_names = bin_names
self.category_indexes = category_indexes
self.category_names = category_names
self.transform_param = copy.deepcopy(transform_param)
self.need_run = need_run
self.skip_static = skip_static
self.local_only = local_only
check(self)
¶Source code in federatedml/param/feature_binning_param.py
def check(self):
descr = "Binning param's"
self.check_string(self.method, descr)
self.method = self.method.lower()
self.check_positive_integer(self.compress_thres, descr)
self.check_positive_integer(self.head_size, descr)
self.check_decimal_float(self.error, descr)
self.check_positive_integer(self.bin_num, descr)
if self.bin_indexes != -1:
self.check_defined_type(self.bin_indexes, descr, ['list', 'RepeatedScalarContainer', "NoneType"])
self.check_defined_type(self.bin_names, descr, ['list', "NoneType"])
self.check_defined_type(self.category_indexes, descr, ['list', "NoneType"])
self.check_defined_type(self.category_names, descr, ['list', "NoneType"])
self.check_open_unit_interval(self.adjustment_factor, descr)
self.check_boolean(self.local_only, descr)
HeteroFeatureBinningParam (FeatureBinningParam)
¶
Source code in federatedml/param/feature_binning_param.py
class HeteroFeatureBinningParam(FeatureBinningParam):
def __init__(self, method=consts.QUANTILE,
compress_thres=consts.DEFAULT_COMPRESS_THRESHOLD,
head_size=consts.DEFAULT_HEAD_SIZE,
error=consts.DEFAULT_RELATIVE_ERROR,
bin_num=consts.G_BIN_NUM, bin_indexes=-1, bin_names=None, adjustment_factor=0.5,
transform_param=TransformParam(), optimal_binning_param=OptimalBinningParam(),
local_only=False, category_indexes=None, category_names=None,
encrypt_param=EncryptParam(),
need_run=True, skip_static=False):
super(HeteroFeatureBinningParam, self).__init__(method=method, compress_thres=compress_thres,
head_size=head_size, error=error,
bin_num=bin_num, bin_indexes=bin_indexes,
bin_names=bin_names, adjustment_factor=adjustment_factor,
transform_param=transform_param,
category_indexes=category_indexes,
category_names=category_names,
need_run=need_run, local_only=local_only,
skip_static=skip_static)
self.optimal_binning_param = copy.deepcopy(optimal_binning_param)
self.encrypt_param = encrypt_param
def check(self):
descr = "Hetero Binning param's"
super(HeteroFeatureBinningParam, self).check()
self.check_valid_value(self.method, descr, [consts.QUANTILE, consts.BUCKET, consts.OPTIMAL])
self.optimal_binning_param.check()
self.encrypt_param.check()
if self.encrypt_param.method != consts.PAILLIER:
raise ValueError("Feature Binning support Paillier encrypt method only.")
if self.skip_static and self.method == consts.OPTIMAL:
raise ValueError("When skip_static, optimal binning is not supported.")
self.transform_param.check()
if self.skip_static and self.transform_param.transform_type == 'woe':
raise ValueError("To use woe transform, skip_static should set as False")
__init__(self, method='quantile', compress_thres=10000, head_size=10000, error=0.0001, bin_num=10, bin_indexes=-1, bin_names=None, adjustment_factor=0.5, transform_param=<federatedml.param.feature_binning_param.TransformParam object at 0x7f7edae746d0>, optimal_binning_param=<federatedml.param.feature_binning_param.OptimalBinningParam object at 0x7f7edae74710>, local_only=False, category_indexes=None, category_names=None, encrypt_param=<federatedml.param.encrypt_param.EncryptParam object at 0x7f7edae74850>, need_run=True, skip_static=False)
special
¶Source code in federatedml/param/feature_binning_param.py
def __init__(self, method=consts.QUANTILE,
compress_thres=consts.DEFAULT_COMPRESS_THRESHOLD,
head_size=consts.DEFAULT_HEAD_SIZE,
error=consts.DEFAULT_RELATIVE_ERROR,
bin_num=consts.G_BIN_NUM, bin_indexes=-1, bin_names=None, adjustment_factor=0.5,
transform_param=TransformParam(), optimal_binning_param=OptimalBinningParam(),
local_only=False, category_indexes=None, category_names=None,
encrypt_param=EncryptParam(),
need_run=True, skip_static=False):
super(HeteroFeatureBinningParam, self).__init__(method=method, compress_thres=compress_thres,
head_size=head_size, error=error,
bin_num=bin_num, bin_indexes=bin_indexes,
bin_names=bin_names, adjustment_factor=adjustment_factor,
transform_param=transform_param,
category_indexes=category_indexes,
category_names=category_names,
need_run=need_run, local_only=local_only,
skip_static=skip_static)
self.optimal_binning_param = copy.deepcopy(optimal_binning_param)
self.encrypt_param = encrypt_param
check(self)
¶Source code in federatedml/param/feature_binning_param.py
def check(self):
descr = "Hetero Binning param's"
super(HeteroFeatureBinningParam, self).check()
self.check_valid_value(self.method, descr, [consts.QUANTILE, consts.BUCKET, consts.OPTIMAL])
self.optimal_binning_param.check()
self.encrypt_param.check()
if self.encrypt_param.method != consts.PAILLIER:
raise ValueError("Feature Binning support Paillier encrypt method only.")
if self.skip_static and self.method == consts.OPTIMAL:
raise ValueError("When skip_static, optimal binning is not supported.")
self.transform_param.check()
if self.skip_static and self.transform_param.transform_type == 'woe':
raise ValueError("To use woe transform, skip_static should set as False")
HomoFeatureBinningParam (FeatureBinningParam)
¶
Source code in federatedml/param/feature_binning_param.py
class HomoFeatureBinningParam(FeatureBinningParam):
def __init__(self, method=consts.VIRTUAL_SUMMARY,
compress_thres=consts.DEFAULT_COMPRESS_THRESHOLD,
head_size=consts.DEFAULT_HEAD_SIZE,
error=consts.DEFAULT_RELATIVE_ERROR,
sample_bins=100,
bin_num=consts.G_BIN_NUM, bin_indexes=-1, bin_names=None, adjustment_factor=0.5,
transform_param=TransformParam(),
category_indexes=None, category_names=None,
need_run=True, skip_static=False, max_iter=100):
super(HomoFeatureBinningParam, self).__init__(method=method, compress_thres=compress_thres,
head_size=head_size, error=error,
bin_num=bin_num, bin_indexes=bin_indexes,
bin_names=bin_names, adjustment_factor=adjustment_factor,
transform_param=transform_param,
category_indexes=category_indexes, category_names=category_names,
need_run=need_run,
skip_static=skip_static)
self.sample_bins = sample_bins
self.max_iter = max_iter
def check(self):
descr = "homo binning param's"
super(HomoFeatureBinningParam, self).check()
self.check_string(self.method, descr)
self.method = self.method.lower()
self.check_valid_value(self.method, descr, [consts.VIRTUAL_SUMMARY, consts.RECURSIVE_QUERY])
self.check_positive_integer(self.max_iter, descr)
if self.max_iter > 100:
raise ValueError("Max iter is not allowed exceed 100")
__init__(self, method='virtual_summary', compress_thres=10000, head_size=10000, error=0.0001, sample_bins=100, bin_num=10, bin_indexes=-1, bin_names=None, adjustment_factor=0.5, transform_param=<federatedml.param.feature_binning_param.TransformParam object at 0x7f7edae747d0>, category_indexes=None, category_names=None, need_run=True, skip_static=False, max_iter=100)
special
¶Source code in federatedml/param/feature_binning_param.py
def __init__(self, method=consts.VIRTUAL_SUMMARY,
compress_thres=consts.DEFAULT_COMPRESS_THRESHOLD,
head_size=consts.DEFAULT_HEAD_SIZE,
error=consts.DEFAULT_RELATIVE_ERROR,
sample_bins=100,
bin_num=consts.G_BIN_NUM, bin_indexes=-1, bin_names=None, adjustment_factor=0.5,
transform_param=TransformParam(),
category_indexes=None, category_names=None,
need_run=True, skip_static=False, max_iter=100):
super(HomoFeatureBinningParam, self).__init__(method=method, compress_thres=compress_thres,
head_size=head_size, error=error,
bin_num=bin_num, bin_indexes=bin_indexes,
bin_names=bin_names, adjustment_factor=adjustment_factor,
transform_param=transform_param,
category_indexes=category_indexes, category_names=category_names,
need_run=need_run,
skip_static=skip_static)
self.sample_bins = sample_bins
self.max_iter = max_iter
check(self)
¶Source code in federatedml/param/feature_binning_param.py
def check(self):
descr = "homo binning param's"
super(HomoFeatureBinningParam, self).check()
self.check_string(self.method, descr)
self.method = self.method.lower()
self.check_valid_value(self.method, descr, [consts.VIRTUAL_SUMMARY, consts.RECURSIVE_QUERY])
self.check_positive_integer(self.max_iter, descr)
if self.max_iter > 100:
raise ValueError("Max iter is not allowed exceed 100")
Features¶
- Support Quantile Binning based on quantile summary algorithm.
- Support Bucket Binning.
- Support missing value input by ignoring them.
- Support sparse data format generated by dataio component.
- Support calculating woe and iv as well as counting positive and negative cases for each bin.
- Support transforming data into bin indexes.
- Support multiple hosts binning.
- Support 4 types of optimal binning.
- Support asymmetric binning methods on Host & Guest sides.
- Support multi-class iv\&woe calculation.