我正在按照这篇教程编写朴素贝叶斯分类器:http://machinelearningmastery.com/naive-bayes-classifier-scratch-python/,但是一直出现以下错误:
这是我的代码中出现错误的部分:
dataset[i] = [float(x) for x in dataset[i]]
ValueError: could not convert string to float:
这是我的代码中出现错误的部分:
def loadDatasetNB(filename):
lines = csv.reader(open(filename, "rt"))
dataset = list(lines)
for i in range(len(dataset)):
dataset[i] = [float(x) for x in dataset[i]]
return dataset
以下是文件的命名方式:
def NB_Analysis():
filename = 'fvectors.csv'
splitRatio = 0.67
dataset = loadDatasetNB(filename)
trainingSet, testSet = splitDatasetNB(dataset, splitRatio)
print('Split {0} rows into train={1} and test={2} rows').format(len(dataset), len(trainingSet), len(testSet))
# prepare model
summaries = summarizeByClassNB(trainingSet)
# test model
predictions = getPredictionsNB(summaries, testSet)
accuracy = getAccuracyNB(testSet, predictionsNB)
print('Accuracy: {0}%').format(accuracy)
NB_Analysis()
出了什么问题?如何解决?