[R] R:Exponent
David Winsemius
dwinsemius at comcast.net
Thu Dec 31 22:16:12 CET 2015
> On Dec 31, 2015, at 1:12 PM, David Winsemius <dwinsemius at comcast.net> wrote:
>
>>
>> On Dec 31, 2015, at 11:16 AM, Abram Wooten via R-help <r-help at r-project.org> wrote:
>>
>> Hello,
>>
>> I am new to R and I am having trouble adding an exponent to my problem. For instance,
>>> mat5 <-matrix(c(0.5,0.5,0.25,0.75),2,byrow=T)
>>> mat6 <-matrix(c(0.5,0.5,0.25,0.75),2,byrow=T)
>>> mat5%^%2
>> Error: could not find function "%^%"
>
> The package expm provides matrix exponentials. I think that package Matrix has the same capability, although its help page says that expm::expm is likely to be faster.
And I think I may have conflated matrix power function with matrix exponential. Nonetheless, one can also get a `matpow` function from the same package:
?expm::`%^%`
# returns page for
matpow {expm}
>
> --
> David
>>
>> I unsure on weather I should square mat5 or use the two mats and square them both. I really need some help.
>>
>> Thanks,
>> Abram
>> Sent from Mail for Windows 10
>>
David Winsemius
Alameda, CA, USA
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