row.names(x)
row.names(x) <- value

rownames(x, do.NULL = TRUE, prefix = "row")

rownames(x) <- value

colnames(x, do.NULL = TRUE, prefix = "col")

colnames(x) <- value

####################################
results <- data.frame(matrix(c(1,2,3,4),nrow=2,ncol=2))
rownames(results) <- c("a","b")
colnames(results) <- c("c","d")
attr(results,"title") <- "aaa"
results

#####################################

> colnames(data)
[1] "col1" "col2" "col3"
>
> # set the name of column 2
> colnames(data)[2] <- 'column 2'
> colnames(data)
[1] "col1"     "column 2" "col3"
>     
> # you can assign all of the columns at once, if you wish
> colnames(data) <- c( 'col 1', 'col 2', 'col 3')
> colnames(data)
[1] "col 1" "col 2" "col 3"
> str(data)
'data.frame': 2 obs. of  3 variables:
$ col 1: Factor w/ 2 levels "1,233","470": 1 2
$ col 2: Factor w/ 2 levels " $1,113.22"," $12.79": 2 1
$ col 3: Factor w/ 2 levels " $0.12"," $1,333,233.17": 2 1

REF:
https://stackoverflow.com/questions/2281353/row-names-column-names-in-r

http://www.astrostatistics.psu.edu/su07/R/html/base/html/colnames.html

http://earlh.com/blog/2009/06/29/column-names-of-r-data-frames/

Get and Set Column/Row Names for Data Frames的更多相关文章

  1. R读数据stringsAsFactors=F,存数据时row.names = F

    stringsAsFactors=F   以前在r里读数据,经常把character读成factor,还得费半天劲把它转回来,尤其是把factor转成numeric还没有那么直接.例如: dat< ...

  2. mysql Out of range value adjusted for column导致Warning(1265)Data truncated for column 'column_name' at row 1

    今天下午,我们的一个开发来找我,说线上有个环境报了"Warning(1265)Data truncated for column 'column_name' at row 1",定 ...

  3. [转]jQuery: get table column/row index remove table column (by column number)

    本文转自:http://www.xinotes.org/notes/note/1087/ <!DOCTYPE html><html><head> <title ...

  4. flutter column row布局的列表自适应宽高

    mainAxisSize: MainAxisSize.min

  5. NetSuite SuiteScript 2.0 export data to Excel file(xls)

    In NetSuite SuiteScript, We usually do/implement export data to CSV, that's straight forward: Collec ...

  6. R语言常用基础知识

    seq(from = 1, to = 1, by = ((to - from)/(length.out - 1)),     length.out = NULL, along.with = NULL, ...

  7. R语言常用基础知识(入门)

    data.frame 动态确定列名称 var <- "mpg" #Doesn't work mtcars$var #These both work, but note tha ...

  8. TP5.0 excel 导入导出

    引第三方的phpexcel类库放到 ThinkPHP\Library\Vendor\demo下,自己建的文件夹demo 再将Excel.class放到ThinkPHP\Library\Org\clas ...

  9. PHP Yii2.0PHPexecl导入。

    use app\models\execl; use \PHPExcel; /*execl导入数据*/ public function Execlupload(){ if(Yii::$app->r ...

随机推荐

  1. MPI Maelstrom(East Central North America 1996)(poj1502)

    MPI Maelstrom 总时间限制:  1000ms 内存限制:  65536kB 描述 BIT has recently taken delivery of their new supercom ...

  2. Linux 查看磁盘或文件夹及文件大小

    当磁盘大小超过标准时会有报警提示,这时如果掌握df和du命令是非常明智的选择. df可以查看一级文件夹大小.使用比例.档案系统及其挂入点,但对文件却无能为力.    du可以查看文件及文件夹的大小. ...

  3. 使用Navicat导入SQL文件

    2018-11-04 19:35:12 开始写 刷新后就可以看见导入的数据库了(按F5刷新) 谢谢.Thank you.Salamat Do(撒拉玛特朵).あリがCám o*n(嘉蒙)とゥ(阿里嘎都) ...

  4. Java集合-----Set详解

    Set是没有重复元素的集合,是无序的 1.HashSet HashSet它是线程不安全的       HashSet常用方法:   add(E element)  将指定的元素添加到此集合(如果尚未存 ...

  5. Gardener Bo (树剖 + 问题分解)

    一开始没看懂计算答案的第四部和update2,很迷.然后一直推敲之后才发下我计算的时候漏掉一个关键点.没有把加值的影响放到父节点上. #include<bits/stdc++.h> #de ...

  6. spring aop 执行顺序

    aop 执行顺序: // @Before // @AfterThrowing order 值越小,执行时越靠前 // @After // @AfterReturning order 值越大,执行时越靠 ...

  7. volatile 线程内存模型

  8. DataBase(28)

    1.数据库管理系统(DataBase Management System,DBMS):指一种操作和管理数据库的大型软件,用于建立.使用和维护数据库,对数据库进行统一管理和控制,以保证数据库的安全性和完 ...

  9. 高性能NIO框架Netty入门篇

    http://cxytiandi.com/blog/detail/17345 Netty介绍 Netty是由JBOSS提供的一个java开源框架.Netty提供异步的.事件驱动的网络应用程序框架和工具 ...

  10. shell脚本和python脚本实现批量ping IP测试

    先建一个存放ip列表的txt文件: [root@yysslopenvpn01 ~]# cat hostip.txt 192.168.130.1 192.168.130.2 192.168.130.3 ...