similar to: The standard deviation of measurement 1 with respect to measurement 2

Hi, I can not comprehend the linear fitting results of polynoms. For example, given the following data (representing y = x^2): > x <- 1:3 > y <- c(1, 4, 9) performing a linear fit > f <- lm(y ~ poly(x, 2)) gives weird coefficients: > coefficients(f) (Intercept) poly(x, 2)1 poly(x, 2)2 4.6666667 5.6568542 0.8164966 However the fitted() result makes sense: >

Hi, my client pc hangs on pxelinux before starting to fetch the linux kernel. It hangs after printing the ip information row. No traffic is observed at this point on the network. The pxelinux is transferred to the client through a tftp server and with no problems. What options do I have to proceed from this point and try to find out where the problem is? Thanks, Firas. -- Firas Swidan, PhD

Hi, I am having difficulties in finding ways to analyse scatter plots and quantitatively differentiate between them. Since this is best demonstrated by a figure, I have attached one with 4 subfigures (a)-(d). Qualitatively (and I hope you would agree with me), sub-figures (a), (b), and (d) seem to represent uniform 2d scatters. It is hard for me to quantify it, but it seems as if the envelopes

Hi, I am experiencing a long delay when using dataframes inside loops and was wordering if this is a bug or not. Example code: > st <- rep(1,100000) > ed <- rep(2,100000) > for(i in 1:length(st)) st[i] <- ed[i] # works fine > df <- data.frame(start=st,end=ed) > for(i in 1:dim(df)[1]) df[i,1] <- df[i,2] #takes for ever R: R 2.0.0 (2004-10-04) OS: Linux, Fedora Core 2

Dear I hope you are wery well when read this e-mail.My name is Firas ALSHAWY and I am a Phd student in the high Institute of marine research - tishreen university- Syria I would like to want some help my in my research, I have data ( length - weight - gonad weight - fishing mortality - natural mortality - the number of fish-temperature of water, maximum age ) , I would like to use the package (

Hi, R is having the following weird behavior and I am not sure if that is a feature or a bug: I am working on the following "3D" array: > bIm , , 1 [,1] [1,] TRUE [2,] TRUE [3,] TRUE [4,] TRUE [5,] TRUE > class(bIm) [1] "array" > dim(bIm) [1] 5 1 1 When I try to get the first 2D subarray, the whole thing folds into a vector: > bIm[,,1] [1] TRUE TRUE TRUE

Hi, I have collected a bunch of old PII PCs that I am trying to PXE boot. There NICs are old and so I use etherboot floppy to emulate a native PXE boot. I have configured tftp, dhcpd, pxelinux, and all the other stuff. Everything works fine till pxelinux start booting. Then it stucks after printing the IP row. --------------- pxelinux output ----------------------- PXELINUX 3.10 2005-08-24

Hi, I am having a problem with a very slow indexing and sub-sectioning of a 3d array: > dim(arr) [1] 245 175 150 For each point in the array, I am trying to calculate the mean of the values in its surrounding: mean( arr[ (i - radius):(i + radius), (j - radius):(j + radius), (k - radius):(k + radius)] ) Putting that code in 3

Hi all, I am a new R- user and I am going through the R-manuals, but I could not find an answer for my question. I am confused about when to use the GAM package and when to use the MGCV package?? My Model is a GAM model of continuous outcome and many non-linear continuous predictors (using the "s" function) as well as categorical predictors. Thanks in advance for your help and

Hi, I have a small R question: how to print a single "\" character? I have the following results: > print("\") does not work > print("\\") [1] "\\" I need to make the following substitution as well, but it does not work either: > sub("_","\_","g_g") [1] "g_g" Thanks in advance, Firas.

Hi, I was wondering if anyone is aware of an R interface to ImageMagick (www.imagemagick.org)? Since R does not support a lot of image processing functions, having such an interface could be very useful. Alternatively, ImageMagick has a couple of different interfaces (including to C and C++). I was wondering if one can use these to call ImageMagick functions from R. I am posting a similar

Hi, I am using the following command to print to a file (I omitted the file details): cat( paste( paste(orientation, start, end, names,"\n"), paste(start, end, "exon\n"), sep="")) where "orientation" and "names" are character vectors and "start" and "end" are integer vectors. The problem is that R coerce the integer vectors

Hi R users, I'd like to draw a nomogram using a competing-risks regression (crr function in R), rather than a cox regression. However, the nomogram function provided in the Design package is not good for this purpose. Do you have any suggestion. I really appreciate your help Many thanks F.Abdollah, MD San-Raffele hospital Milan, Italy -- View this message in context:

================================================================= oVirt Workshop Europe 2012: Call For Participation November 7-9, 2012 - Hotel Fira Palace - Barcelona, Spain (All submissions must be received before midnight Sep 14th, 2012) ================================================================= The oVirt Project is an open virtualization project for anyone who cares about Linux-based

================================================================= oVirt Workshop Europe 2012: Call For Participation November 7-9, 2012 - Hotel Fira Palace - Barcelona, Spain (All submissions must be received before midnight Sep 14th, 2012) ================================================================= The oVirt Project is an open virtualization project for anyone who cares about Linux-based

I want to implement a snmp-agent to measure the bandwidth traffic per flow in a linux router. Is there any way to use tc in bash scripts in order to measure the bandwidth? In my first thought, the agent would fire repeatedly tc commands that would return the rate /flow. Is that speculation correct? Do you propose an alternative way to measure the bandwith through an agent. I found somewhere

Hola everyone, I'm doing an analisys about abundance of a planctonic specie in Robinson Crusoe Islan and I am having a hard time just adding the superscripts and the 100 (one hundred) in the measure of abundance. Perhaps this is so basic to you, but I need to put the real unit of measure. Individuals / 100 cubic meters. I have been looking in websites and R-list and there is not any

Hi, I have installed Xen 3.3.1 with Ubuntu 8.04 as dom0 and fedora9 (from jailtime.org) as Dom1. I have more instances of the same fedora9 with separate config files running as other guest domains. But these guest domains dont have any program / application running. So, xm list shows that they are in blocked state as no activity is happening. I wrote a shell script that counts upto large numbers

Hi, I have installed Xen 3.3.1 with Ubuntu 8.04 as dom0 and fedora9 (from jailtime.org) as Dom1. I have more instances of the same fedora9 with separate config files running as other guest domains. But these guest domains dont have any program / application running. So, xm list shows that they are in blocked state as no activity is happening. I wrote a shell script that counts upto large numbers

Hi all, If I want to measure the Dom0 CPU utilization, which is a more accurate way among the following 3 options? 1. Running profiling program like "sar" in domain 0. 2. Running Xentop in domain 0 3. Running Xenmon.py in domain 0 By running these 3 different program, the results have certain differences. So I am confused here which to use.Thank you in advance. Lei