[R] Fill NA values in columns with values of another column

[Petr Pikal]

Hallo Francesca

If you had an object with correct setting, something like template

> dput(res)
structure(list(V1 = c("1", "2", "3", "4", "5", "6", "7", "8"),
    V2 = c(2, 7, 10, 4, 9, 5, 2, 6)), class = "data.frame", row.names =
c("1",
"2", "3", "4", "5", "6", "7", "8"))

you could merge it with your object where some values are missing

> dput(daf)
structure(list(X1 = c(6L, 9L, NA, 5L, NA, NA, 4L, 2L, 2L, NA,
NA, NA, 5L, 9L, NA, NA, 10L, 7L, 2L, NA, 7L, NA, NA, NA, NA,
2L, 4L, 6L, 10L, NA, NA, NA), X2 = c(8L, 5L, 1L, 6L, 7L, 2L,
4L, 7L, 7L, 3L, 2L, 4L, 6L, 5L, 5L, 6L, 3L, 2L, 1L, 7L, 2L, 8L,
4L, 5L, 6L, 1L, 4L, 8L, 3L, 3L, 8L, 1L)), class = "data.frame", row.names =
c(NA,
-32L))

> merge(daf, res, by.x="X2", by.y="V1")
   X2 X1 V2
1   1 NA  2
2   1 NA  2
3   1  2  2
4   1  2  2
5   2 NA  7
6   2 NA  7
7   2  7  7
8   2  7  7
9   3 10 10
10  3 NA 10
11  3 10 10
12  3 NA 10
13  4  4  4
14  4 NA  4
15  4  4  4
16  4 NA  4
17  5  9  9
18  5 NA  9
19  5 NA  9

Cheers.
Petr




st 28. 8. 2024 v 0:45 odesílatel Francesca PANCOTTO via R-help <
r-help using r-project.org> napsal:

> Dear Contributors,
> I have a problem with a database composed of many individuals for many
> periods, for which I need to perform a manipulation of data as follows.
> Here I report the procedure I need to do for the first 32 observations of
> the first period.
>
>
> cbind(VB1d[,1],s1id[,1])
>       [,1] [,2]
>  [1,]    6    8
>  [2,]    9    5
>  [3,]   NA    1
>  [4,]    5    6
>  [5,]   NA    7
>  [6,]   NA    2
>  [7,]    4    4
>  [8,]    2    7
>  [9,]    2    7
> [10,]   NA    3
> [11,]   NA    2
> [12,]   NA    4
> [13,]    5    6
> [14,]    9    5
> [15,]   NA    5
> [16,]   NA    6
> [17,]   10    3
> [18,]    7    2
> [19,]    2    1
> [20,]   NA    7
> [21,]    7    2
> [22,]   NA    8
> [23,]   NA    4
> [24,]   NA    5
> [25,]   NA    6
> [26,]    2    1
> [27,]    4    4
> [28,]    6    8
> [29,]   10    3
> [30,]   NA    3
> [31,]   NA    8
> [32,]   NA    1
>
>
> In column s1id, I have numbers from 1 to 8, which are the id of 8 groups ,
> randomly mixed in the larger group of 32.
> For each group, I want the value that is reported for only to group
> members, to all the four group members.
>
> For example, value 8 in first row , second column, is group 8. The value
> for group 8 of the variable VB1d is 6. At row 28, again for s1id equal to
> 8, I have 6.
> But in row 22, the value 8 of the second variable, reports a value NA.
> in each group is the same, only two values have the correct number, the
> other two are NA.
> I need that each group, identified by the values of the variable S1id,
> correctly report the number of variable VB1d that is present for just two
> group members.
>
> I hope my explanation is acceptable.
> The task appears complex to me right now, especially because I will need to
> multiply this procedure for x12x14 similar databases.
>
> Anyone has ever encountered a similar problem?
> Thanks in advance for any help provided.
>
> ----------------------------------
>
> Francesca Pancotto
>
> Associate Professor Political Economy
>
> University of Modena, Largo Santa Eufemia, 19, Modena
>
> Office Phone: +39 0522 523264
>
> Web: *https://sites.google.com/view/francescapancotto/home
> <https://sites.google.com/view/francescapancotto/home>*
>
>  ----------------------------------
>
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>
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