[R] Equivalent to matlab ".*" operator in R

[Dénes Tóth]

Hi,

It is better to use sweep() for these kinds of problems, see ?sweep

y <- matrix(cbind(c(0, 0.5, 1),c(0, 0.5, 1)),ncol=2)
z <- matrix(c(12, -6),ncol=2)
sweep(y, 2, z, "*")


Best,
   Denes



On 11/19/2014 03:50 PM, Berend Hasselman wrote:
> On 19-11-2014, at 15:22, Ruima E. <ruimaximo at gmail.com> wrote:
>
>> Hi,
>>
>> I have this:
>>
>> y = matrix(cbind(c(0, 0.5, 1),c(0, 0.5, 1)),ncol=2)
>> z = matrix(c(12, -6),ncol=2)
>>
>> In matlab I would do this
>>
>>> y .* x
>> I would get this in matlab
>>
>>> ans
>> 0    -0
>> 6    -3
>> 12   -6
>>
>> What is the equivalent in R?
>>
> One way of doing this could be:
>
> y * rep(z,1,each=nrow(y))
>
> Berend
>
>> Thanks
>>
>> 	[[alternative HTML version deleted]]
>>
>> ______________________________________________
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>> and provide commented, minimal, self-contained, reproducible code.
> ______________________________________________
> R-help at r-project.org mailing list
> 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.