
- Trending Categories
Data Structure
Networking
RDBMS
Operating System
Java
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to change the order of elements in a list in R?
A list in R can contain many types of elements such as vector, data frame, matrices, etc. Sometimes the order of these elements matter, especially in situations when we have large size elements because it is difficult to view large size elements of a list. This ordering can be done with the help of single square bracket and combine operator c as shown in the below examples.
Example
List1<-list(df1<-data.frame(x1=rnorm(20),x2=rnorm(20)),df2<-data.frame(y1=rpois(20,2),y2=rpois(20,6))) names(List1)<-c("df1","df2") List1
$df1
Output
x1 x2 1 1.16664910 -0.12690835 2 -0.02385061 0.93010444 3 -0.73161055 -0.37920223 4 -0.17374218 1.74496001 5 -0.52846135 -0.54911936 6 0.15400858 0.26907145 7 0.62521370 -0.26914570 8 -1.29781529 -0.17368829 9 0.58040525 -0.69834218 10 0.73182782 -0.32848811 11 0.68748989 -0.43500960 12 0.18038886 -1.43329773 13 0.13023523 0.67122340 14 1.06490726 -0.50004983 15 1.44445206 -0.03914249 16 -1.30134077 0.16116851 17 1.17845705 0.10204926 18 0.06419740 1.28705524 19 0.21390196 0.41047054 20 -2.02748272 -1.03792946
Example
$df2
Output
y1 y2 1 1 8 2 3 8 3 5 9 4 0 7 5 3 4 6 1 3 7 2 10 8 0 6 9 1 5 10 1 4 11 2 6 12 0 10 13 2 14 14 3 8 15 5 14 16 2 2 17 0 9 18 1 6 19 1 7 20 4 8
Example
List1<-List1[c("df2","df1")] List1
$df2
Output
y1 y2 1 1 8 2 3 8 3 5 9 4 0 7 5 3 4 6 1 3 7 2 10 8 0 6 9 1 5 10 1 4 11 2 6 12 0 10 13 2 14 14 3 8 15 5 14 16 2 2 17 0 9 18 1 6 19 1 7 20 4 8
Example
$df1
Output
x1 x2 1 1.16664910 -0.12690835 2 -0.02385061 0.93010444 3 -0.73161055 -0.37920223 4 -0.17374218 1.74496001 5 -0.52846135 -0.54911936 6 0.15400858 0.26907145 7 0.62521370 -0.26914570 8 -1.29781529 -0.17368829 9 0.58040525 -0.69834218 10 0.73182782 -0.32848811 11 0.68748989 -0.43500960 12 0.18038886 -1.43329773 13 0.13023523 0.67122340 14 1.06490726 -0.50004983 15 1.44445206 -0.03914249 16 -1.30134077 0.16116851 17 1.17845705 0.10204926 18 0.06419740 1.28705524 19 0.21390196 0.41047054 20 -2.02748272 -1.03792946
Example
List2<-list(M1<-matrix(1:25,ncol=5),M2<-matrix(26:50,ncol=5)) names(List2)<-c("M1","M2") List2
Output
$M1 [,1] [,2] [,3] [,4] [,5] [1,] 1 6 11 16 21 [2,] 2 7 12 17 22 [3,] 3 8 13 18 23 [4,] 4 9 14 19 24 [5,] 5 10 15 20 25 $M2 [,1] [,2] [,3] [,4] [,5] [1,] 26 31 36 41 46 [2,] 27 32 37 42 47 [3,] 28 33 38 43 48 [4,] 29 34 39 44 49 [5,] 30 35 40 45 50
Example
List2<-List2[c("M2","M1")] List2
Output
$M2 [,1] [,2] [,3] [,4] [,5] [1,] 26 31 36 41 46 [2,] 27 32 37 42 47 [3,] 28 33 38 43 48 [4,] 29 34 39 44 49 [5,] 30 35 40 45 50 $M1 [,1] [,2] [,3] [,4] [,5] [1,] 1 6 11 16 21 [2,] 2 7 12 17 22 [3,] 3 8 13 18 23 [4,] 4 9 14 19 24 [5,] 5 10 15 20 25
- Related Questions & Answers
- How to change the name of variables in a list in R?
- How to change the order of bars in bar chart in R?
- How to change the order of columns in an R data frame?
- Python - Change the signs of elements of tuples in a list
- MongoDB query to change order of array elements?
- How to sort a list that contains single sub-elements in decreasing order in R?
- How to find the mean of list elements in R?
- How to extract the names of list elements in R?
- How to select multiple elements of a list in R?
- How to change the order of boxplot by means using ggplot2 in R?
- How to change the row order in an R data frame?
- How to find the sum of two list elements in R?
- How to change the order of independent variables for regression summary output in R?
- How to extract the last value of all elements of a list in R?
- How to make all the elements in a list of equal size in R?
Advertisements