Ifelse condition with multiple conditions

[meitei]

I have a dataframe ,df. I would like to divide value by 5 when RCM_GCM is either CAN or HAD.
Else, I would like to multiple by 3.
I tried the following.

Thank you

RCM_GCM="HAD"
 
 df=data.frame(
   dt=seq(1:5),
   value=c(10,15,5,0,55)
 )
 
 hist1=df %>%
   mutate(valu_his=ifelse(RCM_GCM%in% c("CAN","HAD"),
                            value/5,
                            value*3)
          )

[scottyd22]

Here is one approach.

hist1= df %>%
  rowwise() %>%
  mutate(valu_his = ifelse(RCM_GCM %in% c("CAN","HAD"),
                           value/5,
                           value*3)
         ) %>%
  ungroup()

hist1
#> # A tibble: 5 × 3
#>      dt value valu_his
#>   <int> <dbl>    <dbl>
#> 1     1    10        2
#> 2     2    15        3
#> 3     3     5        1
#> 4     4     0        0
#> 5     5    55       11

Created on 2023-01-11 with reprex v2.0.2.9000