search for: velocities

Rers: I have some ecological data (stream velocity vs. % cover of submerged weeds) that shows strong evidence of a thresholding step-function, e.g. below some velocity, % cover ranges from 0% to 100% (with no apparent relationship to velocity within this range of velocities), but above a certain "threshold" velocity, the % cover does not appear to exceed, say, 10%. There are good mechanistic reasons for believing there is a step function there, so I'm trying to determine the velocity position and significance of this threshold. I came up with the f...

[Apologies in advance for the train of thought prose, but it is brainstorming after all…] I'm going to focus on self-descriptive names rather than literary or fantasy references… Advanced Compiler Kit, affectionately known as “ACK!”? It has an ill- deserved nod to NeXT, even. (Completely the wrong language, after all.) Core Compiler? Heh, I don't think that'd get past certain

Hello. I've just started using R and am trying to figure out if the two codes snippets below have the same output gBest<-floor(runif(popsize,min=1,max=top)) velocity[i,j]<<-.4* velocity[i,j] + 1 * runif(1) * (pbestsVar[i,j] - popVar[i,j]) + 1 * runif(1) * (archiveVar[gBest,j] - popVar[i,j]) and for (i in 1:popsize) { for (j in 1:maxvar) { gBest<-sample(top,size=1)

Hi list, I have a shorewall installed on 2 interfaces which also has multiple static public IP. Let''s say I have 1.2.3.4 and 1.2.3.5. I have assigned nat with: 1.2.3.4 eth0 11.22.33.4 no no But then I have a situation where I need 11.22.33.44 to connect to a host in the net zone and appears also to be 1.2.3.5 not only 1.2.3.4. How to do it? TIA Willy

I have constructed a Trellis style xyplot. lengthf <- factor(length) xyplot(SLI$velocity ~ SLI$width | SLI$lengthf, layout = c(2,7), xlab = "Width (cm)", ylab = "Velocity (m/s^2)", col = "black") This produces a lovely little plot. However, the grouping factor(lengthf) isn't in the right order. My values range from 2-28 and the 2 graph on the bottom left and

Hello, does anyone knows this predict is not resulting? # lm predict dfTestes3sitesCriptic$Velocity_corrected <- ifelse (dfTestes3sitesCriptic$Season == "A" & dfTestes3sitesCriptic$BeforeAfter == "Before", (dfTestes3sitesCriptic$Velocity * mVel3ABefAfter), (ifelse (dfTestes3sitesCriptic$Season == "Sp" & dfTestes3sitesCriptic$BeforeAfter ==

Hi, i have this file pressure,k,eps,zeta,f,velocity:0,velocity:1,velocity:2,vtkValidPointMask,Point Coordinates:0,Point Coordinates:1,Point Coordinates:2,vtkOriginalIndices 0.150545,0.000575811,0.0231277,0.000339049,-0.0193008,0.00318629,-6.24066e-07,5.39599e-05,^A,7,0,0,0 0.150546,0.000782719,0.0226157,0.000497957,-0.0192084,0.00367781,5.09813e-06,5.90689e-05,^A,7,0.0003035,0.000225,1

Dear all, I have the following output generated by linear regression. Since there is only one regression intercept and one slope for one set of data, what is the meaning of std. error for intercept and that of slope? Thanks in advance. Sincerely, Minghua > data(thuesen) > attach(thuesen) > lm(short.velocity~blood.glucose) Call: lm(formula = short.velocity ~ blood.glucose)

hello all, I have a data frame and I want to create a column which assigns a letter based upon the value in another column. The data column has velocities ranging from 0 to 1000. So for example, for velocities between 0 and 300 I'd like to assign the letter "A" in the new column, for 300-600, "B" and so on and so forth. How would I do this? Thank you very much! Mehdi Khan [[alternative HTML version deleted]]

...s with values. I use the function below to scan through a matrix and create mass action flux relationships: makeMassActionFluxes = function(sMatrix) { #Allocate a matrix with identical dimensions as the inputted stoichiometric matrix temp = matrix(nrow = dim(sMatrix)[1], ncol = dim(sMatrix)[2]) velocities = vector(length = dim(sMatrix)[2]) ## This series of 'for' loops scans the stoichiometrix matrix looking for negative integers. ## Once it identifies a negative integer it pulls the row name and exponentiates it to the ## appropriate stoichiometry, creating the flux expression. for (i in...

Dear helpers I have two data sets saved as vectors (temperature and velocity). Now I need to "take out" a span of temperature and its corresponding velocity in the other vector. How can I achieve that? I tried to write a function,which takes a vector entry and then decides wether to delete the temperature entry or not and simultaneously doing so with same entry in the velocity

Hello All, I am attempting to use the feather.plot function from the plotrix package to graph current velocity data as I have speed and direction. I let "r" be the first 10 rows of current speed data and "theta" be the first 10 rows of directional data in radians. I had tried this with 10 measurements, but keep getting the following error message: >

Dear All, I am getting some data from fluid dynamics simulations (air mixing in a pipe, 2D axial symmetry, geometry described by a radial coordinate r and an axial coordinate z) which I'd like to plot and analyze with R. Think about slicing the cylinder along its axial direction to get a set of cross sections which are orthogonal to the z axis. For each section, I have a set of velocity

Hello, We are having some strange issues with RODBC related to integer columns. Whenever we do a sql query the data in a integer column is 150 actual data points then 150 0's then 150 actual data points then 150 0's. However, our database actually has numbers where the 0's are filled in. Furthermore, other datatypes do not have this problem: double and varchar are correct and do not

Hi, I am an astronomer and somewhat new to boostrap statistics. I understand the basic idea of bootstrap resampling, but am uncertain if it would be useful in my case or not. My problem consists of maximizing a likelihood function based on the velocities of a number of stars. My assumed distribution of velocities of these stars is: --------------------------------------------------------------------------- dmy=function(x,v,k,t)(k+1)/(v-t)^(k+1)*(v-x)^k --------------------------------------------------------------------------- where x would be my...

Hi! I was hoping there was a tool which would let me do something like: #flax -o existing.flac --append mytune.flac To merge the 2 files! Also; is it possible to change the velocity/gain of a flac track ? I would love to know how! Regards, Frans

We are trying to configure shorewall as follows: 1. We have shorewall running at gateway (172.16.1.1) with NAT. 2. We have a number of web servers (172.16.1.x/24). These web servers are accessed through port forwarding at the gateway (172.16.1.1) and websites are visible through virtual hosting through a web re-director. 3. Presently the proxy server runs in a transparent mode, i.e., all web

I am trying to get m"dot"s^-1 in a x-axis label for a publication ready graph. I can get ms^-1 with no problem, but I can't get the symbol for the "dot" to work. I am have tried the following: plot(x,y,xlab=expression(paste("Target Velocity (",ms^-1,")")),ylab="Passage Probability",ylim=c(0,1)) which works fine. I tried changing to:

Hi Everyone, LLVM is a growing project, and many of us are very fond of it. :) LLVM is continuing to grow, both in maturity in specific areas and in scope of areas that it is applicable to. When we first started the project, we focused on the design of the intermediate representation. It is a strong design goal that the IR be a self-contained virtual instruction set, which fully describes

I have a data frame (morgan) of hourly river flow, river levels and wind direction and speed thus: Time hour lev.morgan lev.lock2 lev.lock1 flow direction velocity 1 2009-07-06 15:00:00 15 3.266 3.274 3.240 1710.6 180.282 4.352 2 2009-07-06 16:00:00 16 3.268 3.272 3.240 1441.8 192.338 5.496 3 2009-07-06 17:00:00 17 3.268