similar to: More efficient way to use ifelse()?

# Thanks again to everyone who provided suggestions. # I was curious about which approaches would be the fastest... so a little benchmarking # My approach was by far the worst :) # The approach suggested by Duncan Murdoch and Peter Langfelder, based on indexing , was by far the fastest (~ 66times faster than using nested ifelse() ). All the details can be found below for those who are

Dear R users, I have created a Loess surface in R, in which x is relative longitude by miles, y is relative latitude by miles, and z is population density at the neighborhood level. The purpose is to identify some population centers in the region. I'm wondering if there is a way to determine the coordinates (x,y) of each center, so I can know exactly where they are. Let me use the

Hello, I am new and am having a hard time getting the proper syntax for output from loops. I am working on a simulation to generate a null expectation of bee behavior. Pieces of it work. The part that I am having specific difficulty is in output of a vector from within the while loop that I am using. Basically the simulation works as such: I have a starting point and a neighbor matrix and a

Hi, I've been running some simulations for a while and the performance of R has been great. However, I've recently changed the code to perform a sort of chi-square goodness-of-fit test. To get the observed values for each cell I've been using table() - specifically I've been using cut2 from Hmisc to divide up the range into a specified number of cells and then using

Not all OSes have SA_RESTART (for instance, SunOS does not). Also, for the non-SA_RESTART case in scp.c sa.sa_flags was not being initialized (noted by dworkin at village.org). - todd --- scp.c.DIST Sat Feb 17 17:56:33 2001 +++ scp.c Sat Feb 17 17:57:59 2001 @@ -1224,8 +1224,9 @@ struct sigaction sa; sa.sa_handler = updateprogressmeter; sigemptyset((sigset_t *)&sa.sa_mask); +

Dear All, I have a question on overlaying a filled.contour (e.g. on soil properties data) and contour (by elevation) in one graph. Both have the same z matrix dimension. I'm able to overlay both graph, but the plots dimension did not overlap well on the same plots. How can I have both filled.contour and contour on the same graph? The commands that I have written are as follows:

Sorry, this is my first time to post. I have a big data set: first colume is date (ex: 2008-2-150, the second is time (10:30:00), and the following columes are variaty measurement data. Every 30 min, I have one data. I want to find an effecient way to calculate the hourly, daily, monthly and yearly average, and plot them, and eventually use these average data to do further analysis. Thanks!

On Sat, 2014-01-11 at 06:31 -0500, Gene Cumm wrote: > On Sat, Jan 11, 2014 at 12:12 AM, Ronald F. Guilmette > <rfg at tristatelogic.com> wrote: > > > Unfortunately, regardless of whether I perform Step #4 (i.e. running > > the "makeboot.bat" script) while logged in as a user with Admin privs, > > > Accessing physical drive: Access is denied.

In message <BLU0-SMTP145A44932CB6CC2DB4621568BB30 at phx.gbl>, Ady <ady-sf at hotmail.com> wrote: >Recent (testing) Clonezilla versions include changes related to >booting problems, so there are valid reasons to try the very latest >version available. At the time I am writing this email, Clonezilla >Live 2.2.1-22 is the latest available (at this moment, under

Hi Roman, Thanks for your reply. For the spatial coordinates layer, I just have coordinates of the upper left corner, numbers of rows and columns of the spatial map, and grid cell size. How to create a spatial layer of coordinates from this data? Thanks. On Mon, Jan 15, 2018 at 3:26 PM, Roman Lu?trik <roman.lustrik at gmail.com> wrote: > You will need to coerce your data into a

Hi, I have very simple balanced randomized block design where I total have 48 observations of a measure of weights of a product, the product was manufactured at 4 sites, so each site has 12 observations. I want to use lme() from nlme package to estimate the standard error of the product weight. So the data look like: MW site 1 54031 1 2 55286 1 3 54396 2 4 52327 2 5 55963

>From your description, I am **guessing** that you may not want a "spatial map" (including projections) at all, but rather something like a level plot. See ?levelplot in the lattice package for details. Both I am sure ggplot2 has something similar. Apologies if I havemisunderstood your intent/specifications. Cheers, Bert Bert Gunter "The trouble with having an open mind is

Hello I have two DSL modems witch are connected to my isp, in future my boss want to buy another connection via DSL modem. Then i will have 3 DSL modems. With every DSL modem i get 3x8 IP`s (netmask 248) from my ISP, now i have question how to configure gateway wich tools should i use. Because ip route and next hop via. wich i use now makes his work fine but with new kernels there is an error

Upgraded to Samba 3.5.6 from 3.5.2. Samba is running as a standalone server on a box that was upgraded from Slackware 13.1 to Slackware 13.37. All Win XP Pro and Win 7 Pro clients can connect to the workgroup and browse shares and folders exactly as before; however, many complain of intermittent pauses, slowdowns and "Not Responding" messages when traversing directories. The samba server

Hello frieds, do I need to do 'net rpc join -U Administrator' (to selfjoin the localhost to the domain) if I have samba3.0.4 running in ROLE_DOMAIN_PDC and with ldapsam-Backend and want to use winbindd for ntlm_auth squid authentification? -- Best regards, Malte mailto:malte.woelky@gmx.de _________________ Malte Woelky -=[SkyNet]=-

Dear R community, I'm having hard time to understand the kde function in "ks" package. Let me use a 3-dimensional kernel smooth example to explain my question using the elevation data in geoR. ### here is what I did ### library(ks) require(geoR) data(elevation) elev.df <- data.frame(x = elevation$coords[,"x"], y = elevation$coords[,"y"], z = elevation$data)

Hello, I have a data set that needs to be combined so that rows are summed by a group based on a certain variable. I'm pretty sure rowsum() or rowsums() can do this but it's difficult for me to figure out how it will work for my data based on the examples I've read. My data are structured like this: Plot SizeClass Stems 12 Class3 1 12 Class4

hi, is there any wait function in R. I am running one R script to plot many graphs it is in the for loop. its showing no error but its not plotting well I think i can solve this problem with a wait function. Please help me in this regards. If u need any clarification about programme. u can find the script below. best regards, Deepak.M.R Biocomputing Group University of Bologana. #!/usr/bin/R

Hi all, I'm working to apply a function that will generate a matrix of results only when a specific criteria is met. I want my final results to be a matrix with both the values that meet the criteria (the results of the function), and those that to do in the same positions in the matrix (the original numbers). Here's a sample of what I would like to do: t.mean.1.c <- c(-15, -20,

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