[R] Stacking matrix columns

[Ebert,Timothy Aaron]

You could use a for loop in a brute force approach.

-----Original Message-----
From: R-help <r-help-bounces using r-project.org> On Behalf Of Rui Barradas
Sent: Sunday, August 6, 2023 7:37 PM
To: Iris Simmons <ikwsimmo using gmail.com>; Steven Yen <styen using ntu.edu.tw>
Cc: R-help Mailing List <r-help using r-project.org>
Subject: Re: [R] Stacking matrix columns

[External Email]

Às 01:15 de 06/08/2023, Iris Simmons escreveu:
> You could also do
>
> dim(x) <- c(length(x), 1)
>
> On Sat, Aug 5, 2023, 20:12 Steven Yen <styen using ntu.edu.tw> wrote:
>
>> I wish to stack columns of a matrix into one column. The following
>> matrix command does it. Any other ways? Thanks.
>>
>>   > x<-matrix(1:20,5,4)
>>   > x
>>        [,1] [,2] [,3] [,4]
>> [1,]    1    6   11   16
>> [2,]    2    7   12   17
>> [3,]    3    8   13   18
>> [4,]    4    9   14   19
>> [5,]    5   10   15   20
>>
>>   > matrix(x,ncol=1)
>>         [,1]
>>    [1,]    1
>>    [2,]    2
>>    [3,]    3
>>    [4,]    4
>>    [5,]    5
>>    [6,]    6
>>    [7,]    7
>>    [8,]    8
>>    [9,]    9
>> [10,]   10
>> [11,]   11
>> [12,]   12
>> [13,]   13
>> [14,]   14
>> [15,]   15
>> [16,]   16
>> [17,]   17
>> [18,]   18
>> [19,]   19
>> [20,]   20
>>   >
>>
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Hello,

Yet another solution.


t(t(c(x)))

or

x |> c() |> t() |> t()


At first I liked it but it's the slowest of the three, OP's, Iris' (the fastest).

Hope this helps,

Rui Barradas

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