- Trending Categories
Data Structure
Networking
RDBMS
Operating System
Java
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Get a matrix as Output if a condition for a single value is met in R.
If we want to check a condition and the Output based on that condition needs to be a matrix then we can use if else function in R.
For Example, if we have a value say V = 5 and we want to get matrix M1 if V is equal to 5 and matrix M2 if V is not equal to 5 then we can use the below command −
if (V == 5) M1 else M2
Example
Following snippet creates a sample matrices −
M1<-matrix(rpois(80,10),ncol=4) M1
The following matrix is created −
[,1] [,2] [,3] [,4] [1,] 5 6 11 7 [2,] 8 13 7 11 [3,] 9 7 11 13 [4,] 11 14 9 12 [5,] 8 14 9 9 [6,] 9 7 11 7 [7,] 12 9 16 10 [8,] 4 11 9 7 [9,] 14 15 11 6 [10,] 12 5 3 8 [11,] 10 8 9 10 [12,] 11 7 11 10 [13,] 17 12 6 7 [14,] 15 7 7 13 [15,] 16 15 5 17 [16,] 7 7 9 9 [17,] 8 14 5 6 [18,] 14 8 8 7 [19,] 9 8 8 14 [20,] 13 10 12 10
To get a matrix as Output if a condition for a single value is met in R, on the above created matrix, add the following code to the above snippet −
M1<-matrix(rpois(80,10),ncol=4) M2<-matrix(rpois(80,1),ncol=4) M2
The following matrix is created −
[,1] [,2] [,3] [,4] [1,] 2 0 2 4 [2,] 0 1 1 2 [3,] 0 0 0 0 [4,] 0 3 1 1 [5,] 0 1 1 0 [6,] 0 1 2 1 [7,] 0 1 0 0 [8,] 2 0 2 1 [9,] 0 1 0 0 [10,] 0 2 1 1 [11,] 1 0 1 2 [12,] 0 1 0 1 [13,] 0 2 0 0 [14,] 1 0 2 0 [15,] 0 0 0 1 [16,] 1 1 1 0 [17,] 0 1 2 1 [18,] 1 0 1 1 [19,] 0 2 1 0 [20,] 2 2 1 2
To get matrix as Output Conditional_Value is equal to or not equal to 5 on the above created data frame, add the following code to the above snippet −
M1<-matrix(rpois(80,10),ncol=4) M2<-matrix(rpois(80,1),ncol=4) Conditional_Value<-2 if (Conditional_Value == 5) M1 else M2
The following matrix is created −
[,1] [,2] [,3] [,4] [1,] 2 0 2 4 [2,] 0 1 1 2 [3,] 0 0 0 0 [4,] 0 3 1 1 [5,] 0 1 1 0 [6,] 0 1 2 1 [7,] 0 1 0 0 [8,] 2 0 2 1 [9,] 0 1 0 0 [10,] 0 2 1 1 [11,] 1 0 1 2 [12,] 0 1 0 1 [13,] 0 2 0 0 [14,] 1 0 2 0 [15,] 0 0 0 1 [16,] 1 1 1 0 [17,] 0 1 2 1 [18,] 1 0 1 1 [19,] 0 2 1 0 [20,] 2 2 1 2
- Related Articles
- How to delete matrix rows if a particular column value satisfies some condition in R?
- Mask an array where a condition is met in Numpy
- How to sum cells in a column if a condition is met in another column with MySQL?
- Convert a single column matrix into a diagonal matrix in R.
- How to replace the values in a matrix with another value based on a condition in R?
- Interpret the input as a matrix and display a different type for the output in Numpy
- How to convert a matrix into a matrix with single column in R?
- How to multiply single row matrix and a square matrix in R?
- Select a column if condition is met in MySQL to fetch records from current date and current date + 1
- How to force end an entire test suite from the BeforeSuite annotation if a condition is met in TestNG?
- How to check if a matrix has any missing value in R?
- How to change the color of a single bar if a condition is true (Matplotlib)?
- How to save the str output as a string in R?
- How to multiply corresponding row values in a matrix with single row matrix in R?
- How to impute missing values by random value for a single column in R?

Advertisements