Concatenating loop with two data frames

[Jmissima]

Hello Friends!

I'm a begginer with R coding, and I need a help.

I have two data frames (df1 and dd), I would like to concatenate the entire column in df1 wih each value of dd. Using " / " separator.

x1<−rpois(7,5)
df1<−data.frame(x1)
dd<-data.frame("A","B","C","D","E","F")

Output should be:
7/A
6/A
8/A
4/A
3/A
4/A
3/A
7/B
6/B.... So on

Can you help me?

Thanks in advance.

[FJCC]

I would avoid a loop and use expand.grid().

x1<-rpois(7,5)
df1<-data.frame(x1)
dd<-data.frame(Let=c("A","B","C","D","E","F"))
library(tidyr)
FullGrid <- expand.grid(df1$x1,dd$Let)
FullGrid <- unite(FullGrid,col = "Output", Var1, Var2, sep = "/")
FullGrid
#>    Output
#> 1     6/A
#> 2     4/A
#> 3     5/A
#> 4     6/A
#> 5     7/A
#> 6     7/A
#> 7     5/A
#> 8     6/B
#> 9     4/B
#> 10    5/B
#> 11    6/B
#> 12    7/B
#> 13    7/B
#> 14    5/B
#> 15    6/C
#> 16    4/C
#> 17    5/C
#> 18    6/C
#> 19    7/C
#> 20    7/C
#> 21    5/C
#> 22    6/D
#> 23    4/D
#> 24    5/D
#> 25    6/D
#> 26    7/D
#> 27    7/D
#> 28    5/D
#> 29    6/E
#> 30    4/E
#> 31    5/E
#> 32    6/E
#> 33    7/E
#> 34    7/E
#> 35    5/E
#> 36    6/F
#> 37    4/F
#> 38    5/F
#> 39    6/F
#> 40    7/F
#> 41    7/F
#> 42    5/F

^{Created on 2021-06-12 by the reprex package (v0.3.0)}

[Jmissima]

Really Thank you!! It Worked.