How do I fill values in vectors in R?

Question

So I need to create a vector V and fill them with the values based on the vector temp if temp[I] > 100 then fill vi with the string hot else fill with normal

my code is like that

for (I in temp) {
if (temp[I] > 100) {
V[I]="Hot"}
else {
V[I] = "Normal 
}

but I cannot get the answer what is wrong w my code?

`I` iterates over the vector elements, `I` is not a sequence of index values. — user2974951, Jan 14 '22 at 08:32
R is vectorised by default. You don't need a loop to do this. Take a look at the online doc for `ifelse` and you'll be able to do what you want in one line. — Limey, Jan 14 '22 at 08:35
How do you read the online doc? Type `?ifelse` at the console. — Limey, Jan 14 '22 at 08:38
@Limey I have no console only an IDE, I am using hacker ranker — max, Jan 14 '22 at 08:40
@max Use this: `ifelse(temp, "Hot", "Normal")` and pass it to the variable to return through the function. — Meet, Jun 28 '23 at 18:54

score 1 · Answer 1 · answered Jan 14 '22 at 08:40

1

A tidyverse solution:

library(tidyverse)

temp %>% 
  mutate(v = case_when(i > 100 ~ "hot",
                       TRUE ~ "normal"))

answered Jan 14 '22 at 08:40

Desmond

1,047
7
14

Is tidyverse really necessary? – user2974951 Jan 14 '22 at 08:41
No, it's just one solution. There are many other ways to do this. – Desmond Jan 14 '22 at 08:43
how to use ifellse? – max Jan 14 '22 at 08:47

How do I fill values in vectors in R?

1 Answers1