Python SKlearn适合方法不起作用 [英] Python SKlearn fit method not working
本文介绍了Python SKlearn适合方法不起作用的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在使用Python(3.6)和Sklearn进行一个项目.我已经完成了分类,但是当我尝试将其应用于重塑以便与sklearn的fit方法一起使用时,它会返回错误.
I'm working on a project using Python(3.6) and Sklearn.I have done classifications but when I try to apply it for reshaping in order to use it with fit method of sklearn it returns an error.
这是我尝试过的:
# Get all the columns from dataframe
columns = data.columns.tolist()
# Filter the columns to remove data we don't want
columns = [c for c in columns if c not in ["Class"] ]
# store the variables we want to predicting on
target = "Class"
X = data.drop(target, 1)
Y = data[target]
# Print the shapes of X & Y
print(X.shape)
print(Y.shape)
# define a random state
state = 1
# define the outlier detection method
classifiers = {
"Isolation Forest": IsolationForest(max_samples=len(X),
contamination=outlier_fraction,
random_state=state),
"Local Outlier Factor": LocalOutlierFactor(
n_neighbors = 20,
contamination = outlier_fraction)
}
# fit the model
n_outliers = len(Fraud)
for i, (clf_name, clf) in enumerate(classifiers.items()):
# fit te data and tag outliers
if clf_name == "Local Outlier Factor":
y_pred = clf.fit_predict(X)
scores_pred = clf.negative_outlier_factor_
else:
clf.fit(X)
scores_pred = clf.decision_function(X)
y_pred = clf.predict(X)
# Reshape the prediction values to 0 for valid and 1 for fraudulent
y_pred[y_pred == 1] = 0
y_pred[y_pred == -1] = 1
n_errors = (y_pred != Y).sum()
# run classification metrics
print('{}:{}'.format(clf_name, n_errors))
print(accuracy_score(Y, y_pred ))
print(classification_report(Y, y_pred ))
然后返回以下错误:
ValueError: could not convert string to float: '301.48 Change: $0.00'
and it's pointed to `clf.fit(X)` line.
我配置错了什么?
推荐答案
我们可以基于数据集的唯一性将数据集转换为数字数据值,还可以从数据集中删除不必要的列.
We can convert out dataset to numeric data values on the base of their uniqueness and you can also drop un-necessary columns form the dataset.
这是您可以尝试的方法:
Here's how you can try that:
df_full = pd.read_excel('input/samp.xlsx', sheet_name=0,)
df_full = df_full[df_full.filter(regex='^(?!Unnamed)').columns]
df_full.drop(['paymentdetails',], 1, inplace=True)
df_full.drop(['timestamp'], 1, inplace=True)
# Handle non numaric data
def handle_non_numaric_data(df_full):
columns = df_full.columns.values
for column in columns:
text_digit_vals = {}
def convert_to_int(val):
return text_digit_vals[val]
if df_full[column].dtype != np.int64 and df_full[column].dtype != np.float64:
column_contents = df_full[column].values.tolist()
unique_elements = set(column_contents)
x = 0
for unique in unique_elements:
if unique not in text_digit_vals:
text_digit_vals[unique] = x
x+=1
df_full[column] = list(map(convert_to_int, df_full[column]))
return df_full
这篇关于Python SKlearn适合方法不起作用的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文