How to convert a data frame row into character vector in R?

To create a character vector in R we can enclose the vector values in double quotation marks but if we want to use a data frame row values to create a character vector then as.character function can be used. For example, if we have a data frame df then the values in first row of the df can form a character vector using as.character(df[1,]).

Example

 Live Demo

Consider the below data frame −

set.seed(3232)
x<−sample(letters[1:26],25,replace=TRUE)
y<−sample(LETTERS[1:26],25,replace=TRUE)
z<−sample(c("Purity","Impurity","Crystal","Odorless","Chain Reaction"),25,replace=TRUE)
a<−sample(c("High","Medium","Low"),25,replace=TRUE)
df<−data.frame(x,y,z,a)
df

Output

   x    y    z    a
1 w W Odorless Medium
2 r I Chain Reaction High
3 v T Impurity High
4 g H Impurity Medium
5 s I Purity Medium
6 i O Crystal Medium
7 y D Odorless High
8 m L Crystal Medium
9 m B Crystal Low
10 b E Crystal Medium
11 a G Chain Reaction Low
12 j R Odorless Low
13 d H Odorless Low
14 j V Impurity High
15 l Q Crystal High
16 j Z Impurity High
17 a F Chain Reaction Low
18 l L Odorless High
19 x I Odorless Low
20 y Z Crystal Medium
21 q K Chain Reaction High
22 t F Crystal Medium
23 j F Crystal High
24 y F Impurity Medium
25 l A Chain Reaction High

Creating character vectors using rows of data frame df −

as.character(df[1,])
[1] "w" "W" "Odorless" "Medium"
as.character(df[2,])
[1] "r" "I" "Chain Reaction" "High"
as.character(df[3,])
[1] "v" "T" "Impurity" "High"
as.character(df[5,])
[1] "s" "I" "Purity" "Medium"
as.character(df[10,])
[1] "b" "E" "Crystal" "Medium"
as.character(df[12,])
[1] "j" "R" "Odorless" "Low"
as.character(df[13,])
[1] "d" "H" "Odorless" "Low"
as.character(df[15,])
[1] "l" "Q" "Crystal" "High"
as.character(df[18,])
[1] "l" "L" "Odorless" "High"
as.character(df[20,])
[1] "y" "Z" "Crystal" "Medium"
as.character(df[25,])
[1] "l" "A" "Chain Reaction" "High"
as.character(df[21,])
[1] "q" "K" "Chain Reaction" "High"

Example

 Live Demo

Let’s have a look at another example −

G1<−sample(1:4,20,replace=TRUE)
G2<−sample(c("Lower","Upper","Middle"),20,replace=TRUE)
G3<−sample(c("Sensitive","Insenstive"),20,replace=TRUE)
df_G<−data.frame(G1,G2,G3)
df_G

Output

   G1    G2    G3
1 2 Middle Sensitive
2 4 Middle Insenstive
3 2 Middle Sensitive
4 1 Upper Insenstive
5 3 Lower Insenstive
6 1 Upper Insenstive
7 3 Lower Sensitive
8 3 Lower Sensitive
9 3 Lower Sensitive
10 3 Lower Sensitive
11 1 Upper Insenstive
12 2 Lower Sensitive
13 4 Upper Insenstive
14 3 Middle Insenstive
15 2 Upper Sensitive
16 1 Upper Insenstive
17 4 Lower Insenstive
18 4 Middle Sensitive
19 2 Middle Sensitive
20 3 Middle Sensitive
as.character(df_G[1,])
[1] "2" "Middle" "Sensitive"
as.character(df_G[2,])
[1] "4" "Middle" "Insenstive"
as.character(df_G[5,])
[1] "3" "Lower" "Insenstive"
as.character(df_G[7,])
[1] "3" "Lower" "Sensitive"
as.character(df_G[9,])
[1] "3" "Lower" "Sensitive"
as.character(df_G[10,])
[1] "3" "Lower" "Sensitive"
as.character(df_G[12,])
[1] "2" "Lower" "Sensitive"
as.character(df_G[13,])
[1] "4" "Upper" "Insenstive"
as.character(df_G[15,])
[1] "2" "Upper" "Sensitive"

Nizamuddin Siddiqui

Updated on: 06-Nov-2020

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