search for: nearest

Dear Rs: BY having the following code: candidates<-expand.grid(e=c("nearest-neighbor","exaustive"), d=c(70,75,80,85,90,92,94,96,98,99), n=c(20,25,30,35,40)) results in : e d n 1 nearest-neighbor 70 20 2 exaustive 70 20 3 nearest-neighbor 75 20 4 exaustive 75 20 ................ 90 exaustive 90 40 91 nearest-neighbor 92 40 92 exaustive 92 40 93 nearest-neig...

I was wondering if there is a way in R to find k nearest neighbors of various orders, say order 2, 3, or 4. In otherwords neighbors of neighbors of neighbors. You get the idea. I know that I can use knearneigh(matrix.data, k) but this only gives me the k nearest neighbors and not of a particular order. Thanks in advance. -- View this message in co...

Several of the methods I use for analyzing large data sets, such as WinGamma: determining the level of noise in data Relief-F: estimating the influence of variables depend on finding the k nearest neighbors of a point in a data frame or matrix efficiently. (For large data sets it is not feasible to compute the 'dist' matrix anyway.) Seeing the proposed solution to "[R] distance between two matrices" last month for finding _one_ nearest neighbor I came up with a solution ...

R-users, Is there a function for ceiling to the nearest ten? a <- 1:10*4 a [1] 4 8 12 16 20 24 28 32 36 40 The resulting vector should look like this ("ceiling to the nearest ten") [1] 10 10 20 20 20 30 30 40 40 40 Thanks in advance Lauri

...x,y,z). I have used: result<-apply(distppll(data2,cbind(topocon[-nrow(topocon),],topocon[-1,])),1,min) where 'data2' are my measurement coordinates (x, y) and 'topocon' are my topographic contours (x,y). While this gives me an output of the distance from each data point to the nearest topographic contour point, I would also like to output the 'z' value of the nearest topographic point to each data point. Does anyone know how I could go about this? Ideally what I would like to output is a matrix which has: data elevation (data2$z) distance to nearest contour eleva...

Dear all, A hopefully simple question: how do I round a series of values (held in an object) to the nearest 5? I've checked out trunc, round, floor and ceiling, but these appear to be more tailored towards rounding decimal places. Thanks, Steve _________________________________________________________________ icons.

Dear R users, I used nndist() to gain the distance of 2 nearest neighbours of the points in my dataset. Is there a way of getting the ID numbers of these nearest neighbours (along with their distances). The command I used: nn2 <- nndist(X2, k=1:2). This is the output of the nearest neighbour distances I got (the IDs of the given points are there but their...

I couldn't find anything in the chron or timeDate packages, and a good search yielded rounding to the nearest half hour, which I don't want. The data: structure(list(Date = structure(c(1209625080, 1209641460, 1209652500, 1209676800, 1209682860, 1209692100, 1209706980, 1209722580, 1209726300, 1209739620, 1209762780, 1209765720, 1209770520, 1209791040, 1209812580, 1209829920, 1209837180, 1209848160,...

The LLVM IR reference manual states, for fptosi: "The ‘fptosi’ instruction converts its floating-point <http://llvm.org/docs/LangRef.html#t-floating> operand into the nearest (rounding towards zero) signed integer value." I interpreted this to mean that it rounds: The nearest integer to 0.3 is 0. The nearest integer to 0.9 is 1. The nearest integer to 0.5 is either 0 or 1. And this is where the "rounding towards zero" applies - the result is prescribe...

...hat is all positive and greater than zero that I would like to "loosely" classify, for lack of a better word. It looks something like this : 1.07 1.11 1.27 1.59 0.97 0.76 2.23 0.98 0.71 0.88 1.19 1.02 What I'm looking for is a way to round these numbers to the nearest 0.25, i.e. the above matrix would be transformed to : 1.00 1.00 1.25 1.50 1.00 0.75 2.25 1.00 0.75 1.00 1.25 1.00 Anyone have a clever way to do this?? Thanks in advance, Ken

I want to 1) Select for each of the n points in a matrix A, those of the m points in B that lay within a given radius. 2) Of those points within the radius, select the k nearest ones. What I now do is 1) Create an n*m matrix C were I put the distances from all the points in B to the points in A and make NA those cells were the distance is larger than the radius. (The points are geographical locations so I use function rdist.earth in package fields) e.g.: library(fields...

Dear R-user, Is there a way in R to locate the nearest 5 indices to a station, based on distances in a distance matrix. In other words i want to have nearest stations based on the distances in the matrix. The distance matrix, i have, has dimension 44*44. Thankyou very much in advance Elisa [[alternative HTML version deleted]]

...t;> candidate results. (see round(), ceil(), floor()). Rounding in the IEEE 754 sense is simply an algorithm to choose one of the two closest values from some set. It does not only concern how halfway cases are handled. There are a number of rounding attributes defined by IEEE 754: - round to nearest, ties to even (default rounding) - round to nearest, ties away from zero (only for decimal) - round to nearest, ties toward zero (used only for augmented addition) - round up - round down - round toward zero The last of these is the rounding mode under discussion on this thread. Note that the firs...

Hello all, I am brand new to R and doing an exercise for a class. I need to find the nearest neighbour for points in the following matrix: > DistanceMatrix x1 x2 x3 x4 x5 [1,] 0.000000 2.828427 1.581139 2.236068 2.000000 [2,] 2.828427 0.000000 1.581139 4.123106 2.000000 [3,] 1.581139 1.581139 0.000000 2.549510 2.121320 [4,] 2.236068 4.123106 2.549510...

...ep 4, 2020, at 6:26 AM, David Jones via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > > The LLVM IR reference manual states, for fptosi: > > "The ‘fptosi’ instruction converts its floating-point > <http://llvm.org/docs/LangRef.html#t-floating> operand into the nearest > (rounding towards zero) signed integer value." > > I interpreted this to mean that it rounds: > > The nearest integer to 0.3 is 0. > > The nearest integer to 0.9 is 1. > > The nearest integer to 0.5 is either 0 or 1. And this is where the > "rounding toward...

Hi there fellow R-users, Does anyone know if there is a package for k nearest neighbours prediction as opposed to classification? I have found the package knncat but can't see a way to adjust it to predict a continuous variable. Any help would be great, Regards Wayne Jones KSS Ltd Seventh Floor St James's Buildings 79 Oxford Street Manchester M1 6SS Engl...

Hi all, Given the following series of numbers: > t [1] 21.85000 30.90410 43.71000 61.82234 87.43999 123.67296 [7] 174.91997 247.40249 349.91996 494.91815 700.00000 What's the simplest way of formatting them into the nearest "natural looking" (rounded to nearest multiple of 10) numbers? So: t[1] becomes 20 t[2] becomes 30 t[3] becomes 40 t[4] becomes 60 t[5] becomes 90 t[6] becomes 120, etc ? Thus far I've tried signif(t,2) but that's not working great.. Any help would be much appreciated, Thanks...

Is there an implementation of a reasonable k-nearest neighbor finder already in one of the packages? -- +---------------------------------------------------------------------------+ | Robert Gentleman phone : (617) 632-5250 | | Associate Professor fax: (617) 632-2444 | | Department...

...not very good at programming so I thought I would ask the group. I have an irregular grid of data (x = Longitude, y = Latitude). Each pair of my x,y has a categorical value. Obviously linear or any other numerically based interpolation on categorical data does not make sense, so I want to use a nearest neighbor interpolation so that I can extrapolate my irregular grid to a regular grid of Longitude and Latitude. Please help! Thanks again Matt Oliver Institute of Marine and Coastal Sciences Rutgers University, New Brunswick, NJ 07728 oliver at imcs.rutgers.edu

https://bugs.freedesktop.org/show_bug.cgi?id=94817 Bug ID: 94817 Summary: Nearest neighbor scaling? Product: xorg Version: unspecified Hardware: Other OS: All Status: NEW Severity: enhancement Priority: medium Component: Driver/nouveau Assignee: nouveau at lists.freedesktop.org...