R指定一个月中的某个星期(R specify what week in a month)
我有一些股票回报每日数据需要变成每周格式。 由于您仅在周一至周五才了解股票交易，因此我需要累计每天的回报才能获得累积的每周回报。
我曾考虑过使用lubridate的星期功能，但lubridate如何知道本周开始的时间？ 我如何使用平日功能来识别星期，即“星期一”到“星期五”是一周？
例如，我曾想过编写一个循环：如果数据中包含“星期一”到“星期五”，那么我将在这一周内调用它。 但是第二周，我会用什么让R知道我们正在进入第二周？ 那么当我们到达年底并且有52周的时候，如何重新设置周计数，以便我们进入下一年？
这里是dput：
dat = structure(list(date = structure(c(4019, 4022, 4023, 4024, 4025, 4026, 4029, 4030, 4031, 4032, 4033, 4036, 4037, 4038, 4039, 4040, 4043, 4044, 4045, 4046, 4047, 4050, 4051, 4052, 4053, 4054, 4057, 4058, 4059, 4060, 4061, 4065, 4066, 4067, 4068, 4071, 4072, 4073, 4074, 4075), class = "Date"), weekday = c("Friday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Tuesday", "Wednesday", "Thursday", "Friday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday"), COMP = c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L ), week = c(1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 8, 9, 9), RET = c(-0.005435, 0.040984, -0.015748, -0.021333, 0.002725, 0.01087, 0.024194, -0.002625, 0.013158, 0.033766, 0, -0.007538, -0.005063, 0, -0.002545, 0.015306, 0.017588, -0.007407, 0.024876, -0.009709, 0, -0.029412, 0.010101, 0.0075, -0.004963, 0.027431, -0.002427, 0.007299, -0.009662, -0.004878, 0.014706, -0.004831, 0.004854, -0.009662, -0.021951, -0.014963, 0.005063, -0.005038, 0.010127, 0)), .Names = c("date", "weekday", "COMP", "week", "RET"), row.names = c(NA, -40L), class = c("data.table", "data.frame" )) library(data.table) setDT(dat)以下是公司1每日收益从1981-01-02到1981-02-27两个月的数据。 让我们暂时计算回报，并首先关注时间。
周列由周（）函数生成。 正如你所看到的那一周不是我想要的，它从星期三开始到星期三结束。
星期几是由weekdays（）函数生成的。
我想在第一周做出1981-01-02（因为我们在这里只有星期五），1981-01-05到1981-01-09为第二周，反之亦然。
I have some stock return daily data need to turn into weekly format. As you know stock trade only on Monday to Friday, I need to add up each days return to get cumulative weekly return.
I have thought about using lubridate's week function but how does lubridate knows when is the start of the week? How do I make lubridate to recognize the week using weekday function i.e. "Monday" to "Friday" is one week?
I have thought about writing a loop for example: If "Monday" to "Friday" is in the data, then I will call this one week. But for the second week, what shall I use for R to know we are entering second week? Then when we reach year end and we have 52 weeks, how to reset the week count so we are entering the next year?
Here is the dput:
dat = structure(list(date = structure(c(4019, 4022, 4023, 4024, 4025, 4026, 4029, 4030, 4031, 4032, 4033, 4036, 4037, 4038, 4039, 4040, 4043, 4044, 4045, 4046, 4047, 4050, 4051, 4052, 4053, 4054, 4057, 4058, 4059, 4060, 4061, 4065, 4066, 4067, 4068, 4071, 4072, 4073, 4074, 4075), class = "Date"), weekday = c("Friday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Tuesday", "Wednesday", "Thursday", "Friday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday"), COMP = c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L ), week = c(1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 8, 9, 9), RET = c(-0.005435, 0.040984, -0.015748, -0.021333, 0.002725, 0.01087, 0.024194, -0.002625, 0.013158, 0.033766, 0, -0.007538, -0.005063, 0, -0.002545, 0.015306, 0.017588, -0.007407, 0.024876, -0.009709, 0, -0.029412, 0.010101, 0.0075, -0.004963, 0.027431, -0.002427, 0.007299, -0.009662, -0.004878, 0.014706, -0.004831, 0.004854, -0.009662, -0.021951, -0.014963, 0.005063, -0.005038, 0.010127, 0)), .Names = c("date", "weekday", "COMP", "week", "RET"), row.names = c(NA, -40L), class = c("data.table", "data.frame" )) library(data.table) setDT(dat)Here are two month worth of data from 1981-01-02 to 1981-02-27 of company 1's daily return. Lets ignore to calculate the return at the moment and focus on the time first.
week column is generated by weeks() function. As you can see week is not what I wanted, it starts from wednesday and end in wednesday.
weekday is generated by weekdays() function.
I want to make e.g. 1981-01-02 as week 1 (since we have friday here only), 1981-01-05 to 1981-01-09 as week 2 vice versa.
原文：https://stackoverflow.com/questions/50706495
更新时间：2021-10-09 11:10
最满意答案
while(true){ Socket sk = sok.accept(); in = sk.getInputStream(); out = sk.getOutputStream(); Dr byte[] buffer = new byte[1024]; in.read(buffer); String recievedData = new String(buffer); System.out.println(recievedData); out.write(recievedData.getBytes());那个循环是错误的。 收到一条消息后，服务器将丢弃
sk并等待新客户端。你最好试试;
Socket sk = sok.accept(); in = sk.getInputStream(); out = sk.getOutputStream(); byte[] buffer = new byte[1024]; while(true){ int nread = in.read(buffer); String recievedData = new String(buffer, 0, nread); System.out.println(recievedData); out.write(recievedData.getBytes());while(true){ Socket sk = sok.accept(); in = sk.getInputStream(); out = sk.getOutputStream(); Dr byte[] buffer = new byte[1024]; in.read(buffer); String recievedData = new String(buffer); System.out.println(recievedData); out.write(recievedData.getBytes());That loop is wrong. After one received message the server drops
skand will go waiting for a new client.You better try;
Socket sk = sok.accept(); in = sk.getInputStream(); out = sk.getOutputStream(); byte[] buffer = new byte[1024]; while(true){ int nread = in.read(buffer); String recievedData = new String(buffer, 0, nread); System.out.println(recievedData); out.write(recievedData.getBytes());
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