[R] Matrix mulitplication

[(Ted Harding)]

On 16-Feb-04 Peter Dalgaard wrote:
> (Ted Harding) <Ted.Harding at nessie.mcc.ac.uk> writes:
> 
>> Sorry! Missed a trick here:
>> 
>>     At <- t(A)
>>     Bt <- t(B)
>>     E  <- B%*%A
>>     Et <- t(E)
>>     A%*%solve(Et%*%E + C)%*%Et%*%D
>> 
>> (saves 2 multiplications at the relatively cheap cost of 1 transpose)
> 
> Well, you might consider getting rid of the first two transposes since
> you're not actually using them for anything....

Touché ... !
Ted.


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Date: 16-Feb-04                                       Time: 23:41:57
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