小编cod*_*in3的帖子

idxmax()在Pandas中使用该功能时,我一直收到此错误.

Traceback (most recent call last):
  File "/Users/username/College/year-4/fyp-credit-card-fraud/code/main.py", line 20, in <module>
    best_c_param = classify.print_kfold_scores(X_training_undersampled, y_training_undersampled)
  File "/Users/username/College/year-4/fyp-credit-card-fraud/code/Classification.py", line 39, in print_kfold_scores
    best_c_param = results.loc[results['Mean recall score'].idxmax()]['C_parameter']
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pandas/core/series.py", line 1369, in idxmax
    i = nanops.nanargmax(_values_from_object(self), skipna=skipna)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pandas/core/nanops.py", line 74, in _f
    raise TypeError(msg.format(name=f.__name__.replace('nan', '')))
TypeError: reduction operation 'argmax' not allowed for this dtype

我正在使用的熊猫版本是 0.22.0

main.py

import ExploratoryDataAnalysis as eda
import Preprocessing as processor
import Classification as classify
import pandas as pd


data_path = '/Users/username/college/year-4/fyp-credit-card-fraud/data/'

if __name__ …

我已经使用自制软件在我的机器上安装了 XQuartz，然后我重新启动了我的机器，当我尝试在 RStudio 中使用 fix() 命令时，我收到以下错误

> College=read.csv("College.csv",header=T,na.strings ="?")
> fix(College)
Error in edit.data.frame(get(subx, envir = parent), title = subx, ...) : 
  X11 is not available

当我尝试在终端中执行以下操作时，它按预期工作。如何在 RStudio 中使用相同的命令

我正在从一个基本的 Java 程序向一个 URL 发出 HTTP GET 请求，它恰好是"http://localhost:9992/users/john.doe@example.com"：

public class Tester {
    public static void main(String[] args) {
        HttpRequester.doesUserExist("john.doe@example.com");
    }
}

的实现HTTPRequester是这样的：

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class HttpRequester {
    private static HttpURLConnection connection = null;

    public static boolean doesUserExist(final String email) {
    final String targetUrl = Constants.URL_USER_SRVC +  email;
    System.out.println(targetUrl);
    try {
        URL url = new URL(targetUrl);
        connection = (HttpURLConnection) url.openConnection();
        System.out.println(connection.getRequestMethod());
        connection.setRequestMethod("GET");
        connection.setRequestProperty("Content-Type", "application/json");
        connection.setUseCaches(false);
        connection.setDoOutput(true); …