![Vectors Index
5
Values in a vector can be retrieved by declaring an index inside a single
square bracket[]
Eg
If 3rd element Is retrieved
C[3]
C[3:5]
If the index is negative , it would strip the member whose position has the
same absolute value a s the negative index](https://image.slidesharecdn.com/datatypesinr-200413055927/85/Data-types-in-r-5-320.jpg)
![Vectors Index
6
Numeric vector index: A new vector can be sliced from a give n vector with a
numeric index, vector, which consist of member positons of the original vector
to be retrieved
Eg
Name of vector[2,3]
Logical vector index : A new vector can be sliced from a given vector with a
logical index vector, which ahs the same is length as the original vector. Its
members are TRUE if the corresponding members in the original vector are to
be includes in the slice, and FALSE if otherwise](https://image.slidesharecdn.com/datatypesinr-200413055927/85/Data-types-in-r-6-320.jpg)
![Matrics
7
A Matrix is a collection of data elements arranged in a two dimensional
rectangular layout. The following is an example of a matrix with 2 rows and 3
columns
[2 34 6]
All the elements of matrices has to be af same type](https://image.slidesharecdn.com/datatypesinr-200413055927/85/Data-types-in-r-7-320.jpg)
![How to handle vector in R
13
v4= c(1:10)
v4[5] 5
V4[-5] 1 2 3 4 6 7 8 9 10
V4(3:5) 3 4 5
V4[c(3:5),10] 3 4 5 10 range indexing](https://image.slidesharecdn.com/datatypesinr-200413055927/85/Data-types-in-r-13-320.jpg)
Data types in r
- 1. Prof. Neeraj Bhargava Pramod Singh Rathore Department of Computer Science School of Engineering & System Sciences, MDS University Ajmer, Rajasthan, India 1 Data types in R
- 2. Session Objectives What is data type in R ? How to handle data types in R 2
- 3. Data types in R 3 Data types can be listed as • Vectors • Lists • Matrices • Data Frames • Factors
- 4. Vectors 4 Vectors is a list of main components which have same data types Vectors can be define by using c() in R Members in a vectors are officially called components Vectors scan be of integer, numeric, character or logical types.
- 5. Vectors Index 5 Values in a vector can be retrieved by declaring an index inside a single square bracket[] Eg If 3rd element Is retrieved C[3] C[3:5] If the index is negative , it would strip the member whose position has the same absolute value a s the negative index
- 6. Vectors Index 6 Numeric vector index: A new vector can be sliced from a give n vector with a numeric index, vector, which consist of member positons of the original vector to be retrieved Eg Name of vector[2,3] Logical vector index : A new vector can be sliced from a given vector with a logical index vector, which ahs the same is length as the original vector. Its members are TRUE if the corresponding members in the original vector are to be includes in the slice, and FALSE if otherwise
- 7. Matrics 7 A Matrix is a collection of data elements arranged in a two dimensional rectangular layout. The following is an example of a matrix with 2 rows and 3 columns [2 34 6] All the elements of matrices has to be af same type
- 8. Lists 8 List is similar as vector It is a data structure have components of mixed data types
- 9. Data frames 9 A data frame is used fro storing data tables It is a special case of list which as each components of equal length Each component form the column and contents of the components form the rows Data frame can be define by data.frame() function
- 10. Factors 10 Factor is a data structure used for fields that takes only predefined, finite number of values (catergorialc data) Factor variable will always have levels While using data.frame() all the character data are converted into factor
- 11. How to handle vector in R 11 c(2,3,4) output : 2 3 4 Class(c(2,3,4)) numeric C(2,3,”pramod”) “2” “3” “pramod” class(C(2,3,”pramod”)) character Length(c(2,3,4)) 3 a = c(2,3,4) b= c(“a”,”b”,”c”) vec=c(a,b) “2”,”3”,”4”,”a”,”b”,”c” class(vec) character Class(a) numeric
- 12. How to handle vector in R 12 A= c(1,2,3,4) b= c(-1,-2,-3,-4) Vect=a+b 0 0 0 0 v1=c(1,2,3) v2=c(4,5,6,7) v3=v1+v2 warning message 5 7 9 8 recycling rule
- 13. How to handle vector in R 13 v4= c(1:10) v4[5] 5 V4[-5] 1 2 3 4 6 7 8 9 10 V4(3:5) 3 4 5 V4[c(3:5),10] 3 4 5 10 range indexing
- 14. Assignment 1 What is data types in R? Explain each data type with suitable example 14
- 15. Queries ???? 15
- 16. 16