来自数据框的子集不匹配行由第二个数据帧中多个列中的值构成
I would like to "extract" rows of data from a tab separated data frame (df1) where the entries only in columns 1 2 and 3 are not found in a second dat...
按重复次数设置数据帧[重复]
This question already has an answer here: 这个问题在这里已有答案: remove IDs that occur x times R 2 answers 删除出现x次R 2答案的ID If I have a dataframe like...
详解CAN总线:CAN总线报文格式—数据帧
目录1、帧起始2、仲裁段2.1、标准数据帧2.2、扩展数据帧3、控制段4、数据段5、CRC段6、ACK段7、帧结束CAN总线上传输的信息称为报文,当总线空闲时任何连接的单元都可以开始发送新的报文。CAN通信是通过以下5种类型的帧...
将列中的值转换为R中的现有数据帧中的行名
I would like to convert the values in a column of an existing data frame into row names. Is is possible to do this without exporting the data frame an...
如何将数据帧转换为R中的时间序列
I have one csv file in which I have 2 closing prices of stock(on daily basis) 我有一个csv文件,其中我有2个股票收盘价(每日) Dates Bajaj_close Hero_close3/14/2013 1854...
按值使用第二个数据帧值过滤数据帧
I always have had trouble with loops so I am asking here. 2 dataframes. 1 very large and 1 much smaller. Sample versions below. 我总是遇到循环问题所以我在这里问。 2个数...
无法使用日期作为字符串对pandas数据帧(以日期为键)进行切片
I'm generating an empty dataframe with a series of dates as the index. Data will be added to the dataframe at a later point. 我正在生成一个空数据框,其中包含一系列日期作为索引...
如何在保留小数的同时将整个数据帧转换为数字?
I have a mixed class dataframe (numeric and factor) where I am trying to convert the entire data frame to numeric. The following illustrates the type ...
如何将数据帧转换为嵌套列表?
I have a dataframe that I want to convert to a nested list with a custom level of nesting. This is how I do it, but I'm sure there is a better way: 我有...
使用python PRAW提取reddit注释并使用结果创建数据帧
I'm looking to pull all the comments from a reddit post and ultimately get the author name, comment, and upvotes into a dataframe. I'm fairly new to p...
Python:pandas中的数据帧操作和聚合
I have the following df: 我有以下df: dfdict = {'letter': ['a', 'a', 'a', 'b', 'b'], 'category': ['foo', 'foo', 'bar', 'bar', 'spam']}df1 = pd.DataFrame(df...
R重塑,通过块重组数据帧
I am trying to reshape a dataframe: 我正在尝试重塑数据帧: Currently it looks like this: 目前它看起来像这样: ID | Gender |A1 | A2 | A3 | B1 | B2 | B3ID_1 | m | 3 ...
为什么rbind需要一个循环来创建一个数据帧而不仅仅是一个矩阵向量
for (i in 1:5) { dat <- rbind(dat, read.csv(files_full[i])) works, but 工作,但 dat <- rbind(dat, read.csv(files_full[1:5])) doesn't: 不会: ...
从长到宽格式转换/重塑数据帧而不使用“timevar”
I have a data frame that follows the below long Pattern: 我有一个数据框,遵循以下长模式: Name MedName Name1 atenolol 25mg Name1 aspirin 81mg Na...
数据帧列表,如何对每个第n个元素进行分组?
Let's say I have a list of dataframes called old_list: 假设我有一个名为old_list的数据框列表: #old_list will be a list of length 10#Create vectors for the dfs (there...
R将数据帧转换为带标签的Matrix
I have a dataframe with this data. 我有一个包含这些数据的数据框。 # A tibble: 20 x 3# Groups: CpG, Group [20] CpG Group Range <fct> <dbl&...
Pandas将数据帧转换为元组数组
I have manipulated some data using pandas and now I want to carry out a batch save back to the database. This requires me to convert the dataframe int...
将JSON加速到具有大量数据操作的数据帧
I have a massive blob of JSON data formatted as follows: 我有一大堆JSON数据格式如下: [ [{ "created_at": "2017-04-28T16:52:36Z", "as_of": "2017-0...
ggplotting [重复]时,有序数据帧的顺序不同
This question already has an answer here: 这个问题在这里已有答案: Change the order of a discrete x scale 5 answers 更改离散x刻度5个答案的顺序 ggplot2: change or...
如何用R中的其他数据帧替换一个dataframe的一些值?
I have two large dataframe, with the same column and row, but I need to substitute the NA of the first, based on the second. For example assume data f...