outer( p, a )
--
Sent from my phone. Please excuse my brevity.
On May 22, 2016 3:34:31 PM PDT, Jim Lemon <drjimle...@gmail.com> wrote:
>Hi Steven,
>
>as.data.frame(sapply(a,"*",p))
>
>Jim
>
>
>On Mon, May 23, 2016 at 8:22 AM, Steven Yen <sye...@gmail.com> wrote:
>> Dear R users:
>>
>> > # p is a vector if length 10
>> > # a is a vector if length 3
>> > # I like to create a matrix with
>> > # the first column being p multiplied by a[1]
>> > # the second column being p multiplied by a[2]
>> > # the third column being p multiplied by a[3]
>> > # The following would do that:
>> >
>> > a<-c(10,100,1000); a
>> [1] 10 100 1000
>> > p<-matrix(1:10,nrow=10); p
>> [,1]
>> [1,] 1
>> [2,] 2
>> [3,] 3
>> [4,] 4
>> [5,] 5
>> [6,] 6
>> [7,] 7
>> [8,] 8
>> [9,] 9
>> [10,] 10
>> > cbind(a[1]*p,a[2]*p,a[3]*p)
>> [,1] [,2] [,3]
>> [1,] 10 100 1000
>> [2,] 20 200 2000
>> [3,] 30 300 3000
>> [4,] 40 400 4000
>> [5,] 50 500 5000
>> [6,] 60 600 6000
>> [7,] 70 700 7000
>> [8,] 80 800 8000
>> [9,] 90 900 9000
>> [10,] 100 1000 10000
>> >
>> > # Gauss does it easily with an element-by-element
>> > # multiplicationa.*p
>> > # How can I do this in R?
>> >
>>
>>
>> [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
>______________________________________________
>R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
