Question

Exercise 2.2. Type the following code in your terminal. v <- factor(c("2", "3", "5", "7", "11")) a. Convert v to character with as.character. Explain what just happened. b. Convert v to numeric with as. numeric. Explain what just happened. c. How would you convert the values of v to integers?

Answer 1

> #######Solution#############
> v<-factor(c("2","3","5","7","11"))
> v
[1] 2 3 5 7 11
Levels: 11 2 3 5 7
> ######(a)-solution#####
> character_V<-as.character(v)
> character_V   
[1] "2" "3" "5" "7" "11"
> #### Explaination #########
> #When I convert v by using as.character() function, every factor with level 2,3,5,7 and 11 convert into a character .
>   
> ######(b)-solution##############
> numeric_v<-as.numeric(v)
> numeric_v
[1] 2 3 4 5 1
> ####Explaination#########
> ##Basically as.numeric() function is a generic function.
> ##when I covert a v(factor) with level 2,3,5,7 and 11 to quantitative variable,
> ##by using as.numeric() function ,every number is converted into a ranking, and the original values are lost.
> ######(c)-solution#############
> integer_v<-as.numeric(as.character(v))
> integer_v
[1] 2 3 5 7 11
> ####Explaination#########
> ##we can convert values of v into integer by combining two functions as.numeric() and as.character().