将索引上的数据帧与pandas合并
I have two dataframes and each one has two index columns. I would like to merge them. For example, the first dataframe is the following: 我有两个数据帧,每个数据帧...
从R中的文件读取数据帧时如何跳过无效行?
I have a large file which contains lots of data, and I'd like to read it into dataframe, but found some invalid rows. These invalid rows cause the rea...
R:通过unixtime转换为格式化日期/时间的大数据帧的直方图
I am new to R. I have a large dataframe with unix timestamps. 我是R.的新手。我有一个带有unix时间戳的大型数据框。 It is possible to display a histogram via the hist command ...
如何修改数据帧列表中的特定字段?
Suppose I write the following R code: 假设我写以下R代码: first.value <- sample(100, 100, replace=TRUE)second.value <- sample(10, 100, replace=TRUE)X <...
Linux 驱动像单片机一样读取一帧dmx512串口数据
硬件全志R528目标:实现Linux 读取一帧dmx512串口数据。问题分析:因为串口数据量太大,帧与帧之间的间隔太小。通过Linux自带的读取函数方法无法获取到帧头和帧尾,读取到的数据都是缓存区中的,数据量又大。导致缓冲区中一直有很多数据,又由于dmx512数据协议中并没有帧头帧尾字段只有普通数据...
将XML转换为数据帧
I am looking to transfer data from a .php link into an R data frame, but am having trouble doing so. 我希望将数据从.php链接传输到R数据框架中,但是这样做有困难。 Attempts thus fa...
过滤匹配矢量的所有值的数据帧
I want to filter data frame x by including IDs that contain rows for Hour that match all values of testVector. 我想通过包含包含与HourVall的所有值匹配的Hour行的ID来过滤数据框x...
将某些浮动数据帧列格式化为pandas中的百分比
I am trying to write a paper in IPython notebook, but encountered some issues with display format. Say I have following dataframe df, is there any way...
在R中对不同的数据。帧应用一个函数
I´m a newbie R and I would like to ask the following question. 我一个新手´R和我想问下面的问题。 I have a group of data.frames with 2 columns, and I´d like to apply a...
如何迭代R中的数据帧列表
I have a list in R that contains several data frames. I want to iterate over the data frames and calculate the min/max of a value from the data frame....
R:从一个(大)数据帧到另一个(大)数据帧的网格单元的匹配坐标。
I have a large data frame (~200,000 rows) that contains X-Y coordinates, e.g.: 我有一个包含X-Y坐标的大数据帧(~200,000行),例如: points <- data.frame(X = c(1,3,2,5,4...
分组数据帧并获得总和和计数?
I have a dataframe that looks like this: 我有一个如下所示的数据框: Company Name Organisation Name Amount10118 Vifor Pharma UK Ltd We...
R类型5 R语言 数据帧
R语言数据帧 1特点// 表或二维阵列状结构 每一列包含一个变量的值, 列名称应为非空。 存储在数据帧中的数据可以是数字,因子或字符类型。 每个列应包含相同数量的数据项 2创建数据帧 # Create the data frame. emp.data <- data.frame( ...
R loop - 选取下一个输入并将输出存储到数据帧中
So I'm a newbie to R and basically I'm looking to a large sum of regressions from taking data from one data frame and storing the output into a new da...
反转pandas子集数据帧中的字符串列
I have the following dataframe. 我有以下数据帧。 ID LOC Alice Bob Karen0 1 CH 9|5 6|3 4|41 2 ES 1|1 0|8 2|02 3 DE 2|4 6|6 3|13 4 E...
python使用groupby panda数据帧计算直方图值
I want to group data from a dataframe using dataframe and I want to compute the histogram of the grouped data : This is my dataframe : 我想使用数据框对数据框中的数据...
如何使用if语句将整行分隔成新的数据帧
I have a data frame df that looks something like this: 我有一个数据框df看起来像这样: Date Company MarketCap2000-01-31 Company one 10002000-02...
熊猫:如何将单热编码数据帧转换为邻接矩阵?
I have a data frame df, of the form: 我有一个数据框df,形式如下: Col1 Col2 Col3 0 0 1 01 1 1 02 0 1 ...
在R中打印带有长字符串的数据帧
Let's have a dataframe with long strings in one column: 让我们在一列中有一个包含长字符串的数据帧: df<-data.frame(short=rnorm(10,0,1),long=replicate(10,paste(rep(sampl...
如何将读取的数据帧保存为R中的列表?
I have say about 10 .txt files in my directory that I read like this: 我在我的目录中说了10个.txt文件,我这样读了: sampleFiles <- list.files(directory)for (i in 1:len...