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verticapy.machine_learning.vertica.svm.LinearSVC.predict_proba#

LinearSVC.predict_proba(vdf: str | vDataFrame, X: str | list[str] | None = None, name: str | None = None, pos_label: bool | float | str | timedelta | datetime | None = None, inplace: bool = True) vDataFrame#

Returns the model’s probabilities using the input relation.

Parameters#

vdf: SQLRelation

Object used to run the prediction. You can also specify a customized relation, but you must enclose it with an alias. For example, (SELECT 1) x is valid, whereas (SELECT 1) and “SELECT 1” are invalid.

X: SQLColumns, optional

List of the columns used to deploy the models. If empty, the model predictors are used.

name: str, optional

Name of the added vDataColumn. If empty, a name is generated.

pos_label: PythonScalar, optional

Class label. For binary classification, this can be either 1 or 0.

inplace: bool, optional

If set to True, the prediction is added to the vDataFrame.

Returns#

vDataFrame

the input object.

Examples#

For this example, we will use the winequality dataset.

import verticapy.datasets as vpd

data = vpd.load_winequality()
123
fixed_acidity
Numeric(8)
123
volatile_acidity
Numeric(9)
123
citric_acid
Numeric(8)
123
residual_sugar
Numeric(9)
123
chlorides
Float(22)
123
free_sulfur_dioxide
Numeric(9)
123
total_sulfur_dioxide
Numeric(9)
123
density
Float(22)
123
pH
Numeric(8)
123
sulphates
Numeric(8)
123
alcohol
Float(22)
123
quality
Integer
123
good
Integer
Abc
color
Varchar(20)
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Rows: 1-100 | Columns: 14
train, test = data.train_test_split(test_size = 0.5)

Let’s import the model:

from verticapy.machine_learning.vertica import LogisticRegression

Then we can create the model:

model = LogisticRegression(
    tol = 1e-6,
    max_iter = 100,
    solver = 'Newton',
    fit_intercept = True,
)

We can now fit the model:

model.fit(
    train,
    [
        "fixed_acidity",
        "volatile_acidity",
        "citric_acid",
        "residual_sugar",
        "chlorides",
        "density",
    ],
    "good",
    test,
)

model.predict_proba(
    test,
    [
        "fixed_acidity",
        "volatile_acidity",
        "citric_acid",
        "residual_sugar",
        "chlorides",
        "density",
    ],
    "prediction",
)
123
fixed_acidity
Numeric(8)
123
volatile_acidity
Numeric(9)
123
citric_acid
Numeric(8)
123
residual_sugar
Numeric(9)
123
chlorides
Float(22)
123
free_sulfur_dioxide
Numeric(9)
123
total_sulfur_dioxide
Numeric(9)
123
density
Float(22)
123
pH
Numeric(8)
123
sulphates
Numeric(8)
123
alcohol
Float(22)
123
quality
Integer
123
good
Integer
Abc
color
Varchar(20)
123
prediction_0
Float(22)
123
prediction_1
Float(22)
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885.40.3750.43.30.05429.0147.00.994823.420.529.150white0.9462848088605980.0537151911394022
895.40.4150.191.60.03927.088.00.992653.540.4110.071white0.9042110776713880.095788922328612
905.40.450.276.40.03320.0102.00.989443.220.2713.481white0.6044126324760830.395587367523917
915.40.530.162.70.03634.0128.00.988563.20.5313.281white0.6598636563686920.340136343631308
925.40.590.077.00.04536.0147.00.99443.340.579.760white0.9361639828779940.0638360171220063
935.40.5950.12.80.04226.080.00.99323.360.389.350white0.9360330001815330.0639669998184667
945.40.740.01.20.04116.046.00.992584.010.5912.560red0.9476580314169050.0523419685830949
955.40.8350.081.20.04613.093.00.99243.570.8513.071red0.952747972791260.0472520272087398
965.50.120.331.00.03823.0131.00.991643.250.459.850white0.7839404931451780.216059506854822
975.50.140.274.60.02922.0104.00.99493.340.449.050white0.902290835592610.09770916440739
985.50.140.274.60.02922.0104.00.99493.340.449.050white0.902290835592610.09770916440739
995.50.150.3214.00.03116.099.00.994373.260.3811.581white0.7179877819909060.282012218009094
1005.50.160.311.20.02631.068.00.98983.330.4411.6560white0.6378171612983220.362182838701678
Rows: 1-100 | Columns: 16

Important

For this example, a specific model is utilized, and it may not correspond exactly to the model you are working with. To see a comprehensive example specific to your class of interest, please refer to that particular class.