pandas 签名scatter_matrix方法 [英] The signature of pandas scatter_matrix method

问题描述

Signature: pandas.scatter_matrix(frame, alpha=0.5, figsize=None, ax=None, grid=False, diagonal='hist', marker='.', density_kwds=None, hist_kwds=None, range_padding=0.05, **kwds)                                                            
Docstring:                                                                                                                                                                                                                                   
Draw a matrix of scatter plots.  

在此签名中，没有'c'参数，但是为什么我在虹膜分类练习中看到代码，如下所示:

In this signature, there is not a 'c' argument, but why I am seeing code in the iris classification exercise, as follows:

iris_dataframe = pd.DataFrame(X_train, columns=iris_dataset.feature_names)
grr = pd.scatter_matrix(iris_dataframe, c=y_train, figsize=(15,15), marker='0', hist_kwds={'bins': 20}, s=60, alpha=.8, cmap=mglearn.cm3)

请参阅"c = y_train"部分.

Please see the "c=y_train" part.

推荐答案

c=y_train是将传递给matplotlib函数的关键字参数. Python使用签名中的**kwds捕获它. c=y_train将使用y_train中的数据来指示数据点的颜色.

c=y_train is a keyword argument that will get passed to the matplotlib functions. Python captures it using **kwds in the signature. c=y_train will use the data in y_train to dictate the color of the data points.

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