similar to: Quadratic curve on a loop

Dear R colleagues: Am trying to fit a simple NL model to determine Economical Optimum Nitrogen Rates. The segmented (quadratic + plateau) model only works with some y's, in some cases I get a "singular gradient" error. I'll appreciate any ideas in how to solve the singular gradient error. Thanks, Jose # The following code works using yield2 in the nls model but not using

I need to do a simple cumulative sum by group and add the result to the data. I found an earlier thread in the help files with a few suggestions. Somewhat, one of the suggestions does not work with "my data", and I don't really understand why ? The error am getting using the "my data" below is... Error in data.frame(..., check.names = FALSE) : arguments imply

Folks, This is so simple is driving me crazy. It's not really an R question is more an Statistics question. I applied a chemical in 3 different events during a growing season. I took 3 samples in each event to estimate mean applied chemical. Thus, I can easily estimate means and st.err by event. I can then estimate the total chemical applied for the whole season by adding the 3 means

Hello all, I am an R novice and I have a simple question and hope somebody can help me out. I need to place several labels in a plot, this labels are some kind of text and also some objects (which come from some more complicated R calculations). In one of this labels I'd like to place a superscript, however I cannot find a way to place both the expression and the object in the same

Dear R community, I am using xYplot() from the Hmisc package. The package works great to plot means + CI. But I am having issues handling the scales. I am plotting "Soil Clay content" vs "Soil depth" by "land use". Usually in this type of graphs it is better to place the variable "soil depth" in the y-axis and it should be ordered downward by depth (0-5

Please help getting the R squared value in asymptotic regression model I use the code below model1<-nls(GN1~SSasymp (nrate,a,b,c), data = data.1 ) and R produced the modell coefficients without the R squared value? -- Ahmed M. Attia Research Assistant Dept. Of Soil&Crop Sciences Texas A&M University ahmed <ahmedatia@zu.edu.eg>.attia@ag.tamu.edu Cell phone:

---------- Forwarded message ---------- From: <r-help-owner@r-project.org> Date: Mon, Jan 14, 2013 at 12:31 AM Subject: Help with nonlinear regression To: ahmedatia80@gmail.com The message's content type was not explicitly allowed ---------- Forwarded message ---------- From: Ahmed Attia <ahmedatia80@gmail.com> To: r-help@r-project.org Cc: Date: Mon, 14 Jan 2013 00:31:41 -0800

I'm having trouble with the ordisurf function in the vegan package. I have created an ordination plot (cmdscale) of 60 samples based on Bray-Curtis dissimilarities, and would like to overlay various soil edaphic characteristics as possible clues to the clustering I observe in my plot. However, I find that ordisurf creates a surface on the plot that is a perfect, even gradient - and

I am having troubles with sending faxes. I hope someone can help me work out a better method. Basically we have a special address that our users can send to. It winds up on our Asterisk server which runs a Python script that parses the message for attachments and the phone number from the recipient address. The attachments are converted to TIFF and stored in a folder with various information

I'm running R 2.15.1x64, though the same problem persists for 2.13.0x32 and 2.13.0x64. I am trying to run compiled C code using the .C convention. The code compiles without problems, dynamically loads within the R workspace with no problems, and even runs and gives correct results with no problems. However, R will randomly crash within a few minutes of successfully using the compiled

Hi all there Can some one clarify me on this issue, features wise which is better R or SAS, leaving the commerical aspect associated with it. I suppose there are few people who have worked on both R and SAS and wish they would be able to help me in deciding on this. THank you for the help --------------------------------- [[alternative HTML version deleted]]

I had to make some changes (sorry no diff available) to "configure" in 0.9.9 of the bindings so that I could compile them for OS X 10.4.8. Essentially I replaced the the paths to jni.h with /System/Library/Frameworks/JavaVM.framework/Headers. It compiled without error and created both libxapian_jni.so and xapian_jni.jar in the "built" subdirectory when I ran "make

Does anybody know how to get a pdf file with landscape orientation?. pdf(file= 'my_file.pdf' ,onefile=T,paper='A4') plot(sin, -pi, 2*pi) dev.off() Thank's in advance Juan A. Hernandez Spain [[alternative HTML version deleted]]

Hi, I would like to plot a x,y curve described by the equation : Ax^2 + Bx + Cy^2 + Dy + E == 0 (A,B,C,D,E are constants) This sounds like quite the common task but haven't been able to figure out how to do this. Could you please help ? I am new to R so probably missing something basic. Thanks

I should have this in my head by now... I tried migrating a physical Windows host last night using virt-p2v CD. It ran for 3 hours and then died. I'll get details later from the log but as I think about it, I'll bet it died because I never installed virtio-win in my Fedora migration server. The documentation says do "yum install virtio-win" - but this is RHEL

Hello, Has anybody been able to join an Active Directory 2016 using Samba Winbind? If so, how can this be done? I've been trying but it fails every time and when it finally shows me something using realm list, it won't let me login with any user from the domain, therefore, not working. Thanks, -- Jorge F. Hernandez IT System Administrator *GLOSS* 28 West 25th Street, 12th Floor New

Hi all, I have some time trying to find a way to stop a loop for( ) until the user presses the enter key or any other one and the loop can continue. This could be an example: library(MASS) data <- data.frame(mvrnorm(1000,rep(0,5),Sigma=diag(1,5))) for(i in 1:dim(data)[2]){ plot(density(data[,i]), main=paste('histogram',i)) #here something like waituntil command } Thank's in

Hi All, I bought a DID number from VOxbone...this number could be dialed from any PSTN line and could be forwarded to any SIP server like asterisk server...Now I need to forward this number to my asterisk server so when a customer dial this number from his GSM or Land line PSTN number the call will be forwarde to my asterisk server and I need to play a wav file for example.. Can you please give me

Dear there, I am working on the NHANES survey data, and want to apply quantile regression on these complex survey data. Does anyone know how to do this? Thank you in advance, Yiling Cheng Yiling J. Cheng MD, PhD Epidemiologist CoCHP, Division of Diabetes Translation Centers for Disease Control and Prevention 4770 Buford Highway, N.E. Mailstop K-10 Atlanta, GA 30341 [[alternative HTML

Happy Friday fellow R users. I need some help - I am trying to make a graph using ggplot 2 of some lead isotope ratios. Normally, the isotope mass number appears as a superscript before the chemical symbol. However, I cannot figure out how to do this ggplot2's axis labels. The closest I have come is using "." In front of the numbers I am superscripting e.g: ggplot(....