R包基础实操—tidyverse包 R包基础实操—tidyverse包 核⼼软件包是g g p l o t2、d p l y r、t i d y r、r e a d r、p u r r r、t i b b l e、s t r i n g r和f o r c a t s，它 们提供了建模、转换和可视化数据的功能。其中，r e a d r包⽤于读取数据，t i d ...
4.1 dplyr 基础知识 Dplyr 命令的共同点: - 第一个参数始终是 data frame - 随后的参数通常使用变量名(不带引号)描述要对哪些列进行操作 - 输出始终是一个新的 data frame Dplyr 命令根据其作用对象分为四组:rows,columns,groups, ortables 4.2 行 (row) filter ()和arrange ()两个函数都只影响行,列保持...
spread(): makes “long” data wider separate(): splits a single column into multiple columns unite(): combines multiple columns into a single column 代码语言:javascript 复制 library(tidyr)library(dplyr)DF<-data.frame(Group=rep(1:3,each=4),Year=rep(2006:2009,times=3),Qtr.1=rep(seq(14...
How to rename many columns at once How to bin continuous variables How to create many columns from one column How to anonymize columns How to mask values (e.g. credit card numbers) How to lump factor levels How to order factor levels How to apply a function across many columns How to ...
# RENAME COLUMNS #=== colnames(df.euro_cities) <- c("rank", "city", "country", "population") # inspect df.euro_cities %>% names() df.euro_cities %>% head() Now that we have clean variable names, we will do a little modification of the data itself. When we scraped the...
4.4.1 Select and rename We can select or remove columns with the select() function, using the name or index of the column. To delete columns we make use of the negative sign. The rename function helps in renaming columns with either the same name or their index. residential_mobility <-...
We could useuniteto combine multiple columns into a single column. pasilla_tidy%>% unite("group", c(condition,type)) ## # A SummarizedExperiment-tibble abstraction: 102,193 × 4 ## �[90m# Transcripts=14599 | Samples=7 | Assays=counts�[39m ## .feature .sample counts group ## <...
summarise() reduces multiple values down to a single summary. Rows: filter()chooses rows based on column values. arrange()changes the order of the rows. slice()chooses rows based on location. Columns: select()changes whether or not a column is included. rename()changes the name of columns...
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unite(): combines multiple columns into a single column library(tidyr) library(dplyr) DF <- data.frame(Group=rep(1:3, each=4), Year=rep(2006:2009,times=3), Qtr.1 = rep(seq(14, 20, 2), 3), Qtr.2 = rep(seq(12, 18, 2), 3), ...