向PMML导出模型

Question

我有标记数据，一对分类变量和两个二进制目标变量。

例如标头；

column_1,column_2,column_3,column_4,target_1,target_1 

如何将其导出到PMML？我发现的唯一例子就是没有监督的数据

import pandas

iris_df = pandas.read_csv("Iris.csv")

from sklearn2pmml import PMMLPipeline
from sklearn2pmml.decoration import ContinuousDomain
from sklearn_pandas import DataFrameMapper
from sklearn.decomposition import PCA
from sklearn.feature_selection import SelectKBest
from sklearn.preprocessing import Imputer
from sklearn.linear_model import LogisticRegression

iris_pipeline = PMMLPipeline([
    ("mapper", DataFrameMapper([
        (["Sepal.Length", "Sepal.Width", "Petal.Length", "Petal.Width"], [ContinuousDomain(), Imputer()])
    ])),
    ("pca", PCA(n_components = 3)),
    ("selector", SelectKBest(k = 2)),
    ("classifier", LogisticRegression())
])
iris_pipeline.fit(iris_df, iris_df["Species"])

from sklearn2pmml import sklearn2pmml

sklearn2pmml(iris_pipeline, "LogisticRegressionIris.pmml", with_repr = True)

Answer 1

提供的例子是关于监督分类- y参数的Pipeline#fit(X, y)方法是标签。

你的案子会是这样的：

pipeline = PMMLPipeline(
  ("mapper", DataFrameMapper([
    (feature_column, LabelBinarizer()) for feature_column in ["column_1", "column_2", "column_3", "column_4"] 
  ])),
  ("classifier", LogisticClassification())
)
pipeline.fit(df, df["target_1"])