similar to: Plotting quiver vector tensor arrows 2d field data

Hello everybody I'm trying to write a simple version of matlab's "quiver". The idea is that I have fluid with velocity defined on a grid. I have a matrix of x-components of velocity and a matrix of y-components and I want to see the overall flow pattern. (I work with 2D fluid mechanics problems). My first-stab function is below: quiver <- function(u,v,scale=1) # first

Dear list, I would like to plot arrows with different colors according to arrow length, and also (if possible) with head size proportional to arrow length. The idea is to make a quiver-like plot of matlab with wind speed data. So far, I´ve been able to use different colors, but I need to find a more efficient way to recode arrow length intervals into colors. On the contrary, I can't define

I'm trying to do animation with grid. Basically it's a vector field, like what 'quiver' in Matlab creates. I need to update it with grid.edit(). It seems grid erases the whole thing first, then redraws. Therefore the evident 'flash' between frames. Any way to avoid this flash? Thanks.

List, I'm trying to extract the row names of a table I have read into R. > data <- read.table("mesodata.txt", header=TRUE, row.names=1) When I try to extract them using, > names <- data$row.names I get, > names NULL I've tried changing to a matrix, data frame, etc. and still get "NULL". I've checked ?row.names as well as help on extracting

ibuae~kundgebungrequestinfo computergphone' am-,er''ica d`r`^ugs & 0v^ernig~'ht d'e_,liver~ optimgdasyatidae http://www.morning-meds.com At this announcement Rob began to quiver with excitement, and sat staring eagerly at the Demon, while the latter increased in stature and sparkled and glowed more brilliantly than ever -----Original Message----- From: Mica

Am 11.08.2015 um 22:28 schrieb Dr J Austin: > > Hi Alexander > > [root at maui:/var/log]$ watch 'tail -n40 maillog > > does not quiver when I try to connect That's suspicious. Let's exclude it is the client which causes the problem: Connect directly to the IMAPS server on CLI. openssl s_client -connect <server ip>:993 You hopefully see a greeting message

On Tue, 11 Aug 2015, Dr J Austin wrote: > > > On Tue, 11 Aug 2015, Alexander Dalloz wrote: > >> Am 11.08.2015 um 22:28 schrieb Dr J Austin: >>> >>> Hi Alexander >>> >>> [root at maui:/var/log]$ watch 'tail -n40 maillog >>> >>> does not quiver when I try to connect >> >> That's suspicious. >>

On Tue, 11 Aug 2015, Alexander Dalloz wrote: > Am 11.08.2015 um 21:47 schrieb Dr J Austin: >>> >>> What does cyrus-imapd log? >>> >>> Alexander >>> >>> >> >> Where should I be looking ? > > /var/log/maillog is the default log file for the MAIL facility. Else check > your syslog() daemon configuration. > >

< Does anyone know why they're called random deviates, as opposed to random numbers?> Others will probably give you some technical reason about random numbers can be considered as random deviates from a mean (I think at least the 1875 Galton paper at http://www.mugu.com/galton/ uses similar terminology (I'm not claiming this is the earliest use - just the easiest to access at the

On Tue, 11 Aug 2015, Alexander Dalloz wrote: > Am 11.08.2015 um 22:28 schrieb Dr J Austin: >> >> Hi Alexander >> >> [root at maui:/var/log]$ watch 'tail -n40 maillog >> >> does not quiver when I try to connect > > That's suspicious. > > Let's exclude it is the client which causes the problem: Connect directly to > the IMAPS

Hi, I am trying to fit a smoothing model where there are three dimensions over which I can smooth (x,y,z). I expect interactions between some, or all, of these terms, and so I have set up my model as mdl <- gam(PA ~ s(x) + s(y) + s(z) + te(x,y) + te(x,z) + te(y,z) + te(x,y,z),...) I have recently read about the ti(), "tensor product interaction smoother", which takes care of these

Dear all, I need to compute tensor product of B-spline defined over equi-spaced break-points. I wrote my own program (it works in a 2-dimensional setting) library(splines) # set the break-points Knots = seq(-1,1,length=10) # number of splines M = (length(Knots)-4)^2 # short cut to splineDesign function bspline = function(x) splineDesign(Knots,x,outer.ok = T) # bivariate tensor product of

Hello list, I just had a first shot at the "nouveau" Xorg driver, I'm a regular "nv" user. It compiled and installed without a itch in a short time, congrats (great instructions on http://nouveau.freedesktop.org/wiki/InstallNouveau), ran fine... but with a funny vertical fencing effect: one vertical line out of two was black. After a few minutes, the effect would

Dear R-users, I am searching to the "best" way to compute a series of n matrix multiplications between each matrix (mXm) in an array (mXmXn), and each column of a matrix (mXn). Please find below an example with four possible solutions. The first is a simple for-loop which one might avoid; the second solution employs the tensor product but then manually selects the right outcomes. The

Hi list, I'm working with gamm models of this sort, using Simon Wood's mgcv library: gm<- gamm(Z~te(x,y),data=DATA,random=list(Group=~1)) gm1<-gamm(Z~te(x,y,by=Factor)+Factor,data=DATA,random=list(Group=~1)) with a dataset of about 70000 rows and 110 levels for Group in order to test whether tensor product smooths vary across factor levels. I was wondering if comparing those two

I'd like to compare tests based on the mixed model representation of additive models, testing among others y=f(x1)+f(x2) vs y=f(x1)+f(x2)+f(x1,x2) (testing for additivity) In mixed model representation, where X represents the unpenalized part of the spline functions and Z the "wiggly" parts, this would be: y=X%*%beta+ Z_1%*%b_1+ Z_2%*%b_2 vs y=X%*%beta+ Z_1%*%b_1+ Z_2%*%b_2 + Z_12

Hi Everyone, To complete the outer() and kronecker() functions in the base, may I suggest the following tensor() function, which allows the multiplication of arrays through sets of conformable dimensions. I am happy to write a help page if required. The code also needs a setdiff() function which prompts me to ask: what about simple set functions? I expect many of us have written our own

Hi guys, I need some help to analyzing my data. I start to describe my data: I have 21 matrices, every matrix on the rows has users and on columns has items, in my case films. Element of index (i, j) represent the rating expressed by user i about item j. I have a matrix for each of professions. An example of a this type of matrix is: item 1 item 2 item 3 item4 id

> Date: Wednesday, August 12, 2015 11:14:29 +0100 > From: Dr J Austin <ja at maui.jaa.org.uk> > > > On Tue, 11 Aug 2015, Dr J Austin wrote: > >> >> >> On Tue, 11 Aug 2015, Alexander Dalloz wrote: >> >>> Am 11.08.2015 um 22:28 schrieb Dr J Austin: >>>> >>>> Hi Alexander >>>> >>>> [root

Apparently rsync breaks on FreeBSD if you turn off -O2 (which is the default.) The breakage is apparently inside zlib. You'd have to think it was a compiler bug, but perhaps not. I haven't tried to reproduce it yet. -- Martin ----- Forwarded message from grog@FreeBSD.org ----- Date: Fri, 19 Apr 2002 23:14:46 -0700 (PDT) From: <grog@FreeBSD.org> To: mbp@samba.org Subject: PR