Re: [R] Random projection

2018-12-05 Thread Jan Galkowski
Ms Fleming, This blog post (of mine) may be of interest and hopefully of help: https://667-per-cm.net/2018/11/20/the-johnson-lindenstrauss-lemma-and-the-paradoxical-power-of-random-linear-operators-part-1/ Cheers! -- Jan Galkowski (o°) Westwood, MA (pronouns: *he, him, his*) *Keep your energy

Re: [R] Random projection

2018-12-04 Thread Jeff Newmiller
Your multiplication description sounds more like matrix multiplication than scalar multiplication. R supports matrix multiplication with the %*% operator. I didn't follow the rest of your description... are you doing a homework assignment? There is a no homework policy on this list... On Decemb

[R] Random projection

2018-12-04 Thread rosie fleming
Hello I was wondering if anyone could help. I am using R to perform random projection on Gaussians. I need to take k Gaussian random vectors U1,...,Uk in R(reals) Then for any vector v in d dimensions, perform the random projection: f(v) = v.U1, v.U2, ..., v.Uk which reduces v from d dimensions

Re: [R] Random Projection

2013-10-04 Thread Stefan Evert
On 3 Oct 2013, at 22:39, "Monaghan, David" wrote: > I was wondering, has anyone has encountered an R package that performs random > projection/random mapping? RP is a procedure that is akin to Principal > Components Analysis in that it accomplishes dimensionality reduction, but is > far more

[R] Random Projection

2013-10-03 Thread Monaghan, David
Hello: I was wondering, has anyone has encountered an R package that performs random projection/random mapping? RP is a procedure that is akin to Principal Components Analysis in that it accomplishes dimensionality reduction, but is far more computationally efficient. I have been searching fo