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Hi, I am almost new to R. Would any one show me (please include an example) how to clip a contour or image figure so that I only see the image or lines inside a selected area? Thank you very...

Hi, As I run R long enough, for example if I keep running different glm() models and each model has 500 bootsraps, I alway get the error message on "cannot allocat vector size of xxxKB". I have 64MB of RAM...

Hi, I use the package "nlme" to fit linear regression on data that has 27 groups (subjects). The following is my scripts. lw <- groupedData( y ~ x | group, data = read.table("lw.d",header=T)) lw1 <- lme(y~x,data=lw...

Hi, I have a simple random-coefficients model for m subjects: y = b0 + b1 x + r0 + r1 x + e where b0 and b1 are fixed parameters, r0 and r1 are random, e ~ N(0,s2 I) and R' = [r0, r1...

Hi! I am new to R. I want to install "packages" from Package Sources in the web. I follow the instruction and use the "install.packages" but no luck. Here is what I did: > install.packages(gss,"C:/R/rw1021...

Hi, I am trying to write a r-code that maximizes fish yield, which is summing over a total of 11 months (t=c(1:11)) for one cohort. My code looks like this: t <- c(1:11) days <- 30...

Sorry about my missing statement. My r-code is to find F-value that maximizes fish yield. N0=15.4185,M=0.3,t=t,days=days,wt=wt,st=st,st1=st1 in optimize statement is constants or constant...

Hi, Norm Although I have not done it for Ricker's SR curves, I did logistic curves (for selectivity) and von Bertalanffy growth curves. You can find the examples in the book Pinherio, J.C., and Bates, D.M. 2000...

Hi, I use package "lme" and I am trying to construct the simultaneous confidence intervals for subject residuals inorder to rank the subject-effects. The approach is found in the Fig. 2.12, p.37, and the equation (2.17...