localtime选择00:00值不回显_mice包R中数据缺失值的处理
时间: 2024-05-09 20:16:47 浏览: 13
对于第一个问题,当你使用localtime函数选择00:00时,它可能会返回一个空字符串或者None值,这导致它不会被回显。你可以尝试将返回值转化为字符串,或者使用其他函数代替localtime来解决这个问题。
对于第二个问题,mice包是R语言中用于处理缺失值的包。它可以使用多重插补法来填充缺失值。具体来说,mice包会根据数据集中的其他变量的值,来预测缺失值,然后填充缺失值。下面是一个使用mice包处理缺失值的例子:
```
# 安装并加载mice包
install.packages("mice")
library(mice)
# 读入数据
data <- read.csv("data.csv")
# 对数据进行多重插补
imputed_data <- mice(data)
# 查看插补后的数据
complete_data <- complete(imputed_data)
```
在这个例子中,我们首先加载mice包,并读入包含缺失值的数据。然后,我们使用mice包中的函数进行多重插补。最后,我们使用complete函数来获得插补后的完整数据集。
相关问题
std::string yb_data = msg_data["data"]; std::cout << "函数调用" << "data: " << yb_data << std::endl; //获取当前时间 auto now = std::chrono::system_clock::now(); std::time_t now_c = std::chrono::system_clock::to_time_t(now); // 将时间转换为本地时间 std::tm* local_now = std::localtime(&now_c);能否获得更具体的时间
是的,您可以使用`std::chrono::milliseconds`获取更具体的时间,它可以表示从1970年1月1日零时起的毫秒数。您可以使用以下代码获取当前的毫秒数:
```
auto now = std::chrono::system_clock::now();
auto now_ms = std::chrono::time_point_cast<std::chrono::milliseconds>(now);
auto value = now_ms.time_since_epoch().count();
```
然后,您可以使用`std::gmtime`或`std::localtime`将毫秒数转换为本地或UTC时间,并使用`std::strftime`格式化输出。例如,以下代码将毫秒数转换为本地时间并以指定的格式打印:
```
auto time_ms = std::chrono::milliseconds(value);
auto local_time = std::chrono::time_point_cast<std::chrono::system_clock::duration>(time_ms);
auto local_tm = std::localtime(std::addressof(std::mktime(local_time)));
char buf[100];
std::strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", local_tm);
std::cout << buf << "." << (value % 1000) << std::endl;
```
#include<iostream> #include<ctime> #include<chrono> #include<string> #include<filesystem> #include<fstream> #include<sstream> #include<thread> #include<boost/filesystem.hpp> const uintmax_t MAX_LOGS_SIZE = 10ull * 1024ull * 1024ull * 1024ull; //const uintmax_t MAX_LOGS_SIZE = 10ull; void create_folder(std::string folder_name) { boost::filesystem::create_directory(folder_name); std::string sub_foldername=folder_name+"/logs_ros"; boost::filesystem::create_directory(sub_foldername); } std::string get_current_time() { auto now = std::chrono::system_clock::now(); std::time_t now_c = std::chrono::system_clock::to_time_t(now); std::tm parts = *std::localtime(&now_c); char buffer[20]; std::strftime(buffer, sizeof(buffer), "%Y-%m-%d-%H-%M", &parts); return buffer; } void check_logs_size() { std::string logs_path = "/home/sage/logs/"; boost::filesystem::path logs_dir(logs_path); std::uintmax_t total_size = 0; for (const auto& file : boost::filesystem::recursive_directory_iterator(logs_dir)) { if (boost::filesystem::is_regular_file(file)) { total_size += boost::filesystem::file_size(file); } } if (total_size > MAX_LOGS_SIZE) { boost::filesystem::path earliest_dir; std::time_t earliest_time = std::time(nullptr); for (const auto& dir : boost::filesystem::directory_iterator(logs_dir)) { if (boost::filesystem::is_directory(dir)) { std::string dir_name = dir.path().filename().string(); std::tm time_parts = {}; std::istringstream ss(dir_name); std::string part; std::getline(ss, part, '-'); time_parts.tm_year = std::stoi(part) - 1900; std::getline(ss, part, '-'); time_parts.tm_mon = std::stoi(part) - 1; std::getline(ss, part, '-'); time_parts.tm_mday = std::stoi(part); std::getline(ss, part, '-'); time_parts.tm_hour = std::stoi(part); std::getline(ss, part, '-'); time_parts.tm_min = std::stoi(part); std::time_t dir_time = std::mktime(&time_parts); if (dir_time < earliest_time) { earliest_time = dir_time; earliest_dir = dir.path(); } } } if (!earliest_dir.empty()) { boost::filesystem::remove_all(earliest_dir); } } } int main() { std::string logs_path = "/home/sage/logs/"; while (true) { std::chrono::system_clock::time_point now = std::chrono::system_clock::now(); std::time_t now_c = std::chrono::system_clock::to_time_t(now); std::tm parts = *std::localtime(&now_c); if (parts.tm_min % 10 == 0) { std::string folder_name = logs_path + get_current_time(); create_folder(folder_name); } check_logs_size(); std::this_thread::sleep_for(std::chrono::minutes(1)); } return 0; }修改为ros节点
好的,我可以帮您将这段代码修改为ROS节点。首先,我们需要包含ROS所需的头文件,例如:
```cpp
#include <ros/ros.h>
```
然后,我们需要在main函数中初始化ROS节点:
```cpp
int main(int argc, char** argv) {
ros::init(argc, argv, "log_manager_node");
ros::NodeHandle nh;
// ...
return 0;
}
```
接下来,我们需要将定时任务和日志删除任务分别封装为ROS的定时器和服务。在main函数中,我们可以这样定义一个定时器:
```cpp
ros::Timer timer = nh.createTimer(ros::Duration(60.0), timerCallback);
```
其中,`timerCallback` 是一个你需要定义的回调函数,它将在每隔60秒被定时器调用一次。在回调函数中,你可以像之前的代码一样执行创建文件夹和检查日志大小的任务。
同样地,我们可以定义一个ROS服务来执行删除任务。我们需要在main函数中定义一个服务服务器:
```cpp
ros::ServiceServer delete_logs_server = nh.advertiseService("delete_logs", deleteLogsCallback);
```
其中,`deleteLogsCallback` 是一个你需要定义的服务回调函数,它将在收到删除日志服务请求时被调用。在回调函数中,你可以像之前的代码一样执行删除日志的任务。
最后,完整的ROS节点代码如下:
```cpp
#include <ros/ros.h>
#include <ctime>
#include <chrono>
#include <string>
#include <filesystem>
#include <fstream>
#include <sstream>
#include <thread>
#include <boost/filesystem.hpp>
const uintmax_t MAX_LOGS_SIZE = 10ull * 1024ull * 1024ull * 1024ull;
void create_folder(std::string folder_name) {
boost::filesystem::create_directory(folder_name);
std::string sub_foldername = folder_name + "/logs_ros";
boost::filesystem::create_directory(sub_foldername);
}
std::string get_current_time() {
auto now = std::chrono::system_clock::now();
std::time_t now_c = std::chrono::system_clock::to_time_t(now);
std::tm parts = *std::localtime(&now_c);
char buffer[20];
std::strftime(buffer, sizeof(buffer), "%Y-%m-%d-%H-%M", &parts);
return buffer;
}
void check_logs_size() {
std::string logs_path = "/home/sage/logs/";
boost::filesystem::path logs_dir(logs_path);
std::uintmax_t total_size = 0;
for (const auto& file : boost::filesystem::recursive_directory_iterator(logs_dir)) {
if (boost::filesystem::is_regular_file(file)) {
total_size += boost::filesystem::file_size(file);
}
}
if (total_size > MAX_LOGS_SIZE) {
boost::filesystem::path earliest_dir;
std::time_t earliest_time = std::time(nullptr);
for (const auto& dir : boost::filesystem::directory_iterator(logs_dir)) {
if (boost::filesystem::is_directory(dir)) {
std::string dir_name = dir.path().filename().string();
std::tm time_parts = {};
std::istringstream ss(dir_name);
std::string part;
std::getline(ss, part, '-');
time_parts.tm_year = std::stoi(part) - 1900;
std::getline(ss, part, '-');
time_parts.tm_mon = std::stoi(part) - 1;
std::getline(ss, part, '-');
time_parts.tm_mday = std::stoi(part);
std::getline(ss, part, '-');
time_parts.tm_hour = std::stoi(part);
std::getline(ss, part, '-');
time_parts.tm_min = std::stoi(part);
std::time_t dir_time = std::mktime(&time_parts);
if (dir_time < earliest_time) {
earliest_time = dir_time;
earliest_dir = dir.path();
}
}
}
if (!earliest_dir.empty()) {
boost::filesystem::remove_all(earliest_dir);
}
}
}
void timerCallback(const ros::TimerEvent& event) {
std::string logs_path = "/home/sage/logs/";
std::chrono::system_clock::time_point now = std::chrono::system_clock::now();
std::time_t now_c = std::chrono::system_clock::to_time_t(now);
std::tm parts = *std::localtime(&now_c);
if (parts.tm_min % 10 == 0) {
std::string folder_name = logs_path + get_current_time();
create_folder(folder_name);
}
check_logs_size();
}
bool deleteLogsCallback(std_srvs::Empty::Request& req, std_srvs::Empty::Response& res) {
std::string logs_path = "/home/sage/logs/";
boost::filesystem::path logs_dir(logs_path);
boost::filesystem::remove_all(logs_dir);
return true;
}
int main(int argc, char** argv) {
ros::init(argc, argv, "log_manager_node");
ros::NodeHandle nh;
ros::Timer timer = nh.createTimer(ros::Duration(60.0), timerCallback);
ros::ServiceServer delete_logs_server = nh.advertiseService("delete_logs", deleteLogsCallback);
ros::spin();
return 0;
}
```
在这个节点中,我们定义了一个名为 `log_manager_node` 的ROS节点,并在其中实现了一个定时器和一个服务。定时器每隔60秒检查一次日志大小并创建新的日志文件夹,服务则用于删除所有日志文件。