我想从csv加载训练和测试数据,在scikit/sklearn中运行随机森林回归器,然后预测测试文件的输出。Python Scikit随机森林回归错误
TrainLoanData.csv文件包含5列;第一列是输出,接下来的4列是特征。 TestLoanData.csv包含4列 - 特征。
当我运行代码,我得到错误:
predicted_probs = ["%f" % x[1] for x in predicted_probs]
IndexError: invalid index to scalar variable.
这是什么意思?
这里是我的代码:
import numpy, scipy, sklearn, csv_io //csv_io from https://raw.github.com/benhamner/BioResponse/master/Benchmarks/csv_io.py
from sklearn import datasets
from sklearn.ensemble import RandomForestRegressor
def main():
#read in the training file
train = csv_io.read_data("TrainLoanData.csv")
#set the training responses
target = [x[0] for x in train]
#set the training features
train = [x[1:] for x in train]
#read in the test file
realtest = csv_io.read_data("TestLoanData.csv")
# random forest code
rf = RandomForestRegressor(n_estimators=10, min_samples_split=2, n_jobs=-1)
# fit the training data
print('fitting the model')
rf.fit(train, target)
# run model against test data
predicted_probs = rf.predict(realtest)
print predicted_probs
predicted_probs = ["%f" % x[1] for x in predicted_probs]
csv_io.write_delimited_file("random_forest_solution.csv", predicted_probs)
main()
其实,'predict'的结果是一个浮点数组。 RandomForestRegressor是一个回归模型,而不是分类器。 –
当然,你是对的。 –