我试图使用"train_test_split"函数对数据进行测试和训练的划分,但出现了错误提示:"至少需要一个输入数组"。
"train_test_split"函数的输入可以是数组或DataFrame格式的数据,对吗?
import pandas as pd
import numpy as np
from rpy2.robjects.packages import importr
import rpy2.robjects as ro
import pandas.rpy.common as rpy_common
from sklearn.model_selection import train_test_split
def la():
ro.r('library(MASS)')
pydf = rpy_common.load_data(name = 'Boston', package=None, convert=True)
pddf = pd.DataFrame(pydf)
targetIndex = pddf.columns.get_loc("medv")
# make train and test data
rowNum = pddf.shape[0]
colNum = pddf.shape[1]
print(type(pddf.as_matrix()))
print(pddf.as_matrix().shape)
m = np.asarray(pddf.as_matrix()).reshape(rowNum,colNum)
print(type(m))
x_train, x_test, y_train, y_test = train_test_split(x = m[:, 0:rowNum-2], \
y = m[:, -1],\
test_size = 0.5)
# error: raise ValueError("At least one array required as input")
ValueError: At least one array required as input
x
和y
作为位置参数提供,而应将它们作为关键词参数提供。因此,请从函数调用中删除x =
和y =
。 - Some Guy