similar to: curve

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I am using curve3d in the emdbook package to graph a gaussian copula density function generated via the copula package. Unfortunately, it appears that emdbook masks dmvnorm from the package mvtnorm in a way that prohibits copula from generating the gaussian copula. (Sounds very confusing!) For example, > library(copula) > f<-function(x,y) dcopula(normalCopula(0),c(x,y)) >

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Dear R users, I am trying to import a table from STATA, a dta file. With a table called "table", this is what I do : library("foreign") read.dta(table) It does not work. What am I doing wrong ? Best Regards, Dwayne [[alternative HTML version deleted]]

Hi all, Sorry for the re-post, I sent my previous e-mail before it was complete. I am trying to model seroprevalence using the differential equation: dP/dt = beta*seronegative*.001*(seropositive)-0.35*(0.999)*(seropositive)-r*seropositive. I would like to estimate my two parameters, beta and r, using maximum likelihood methods. I have included my code below:

Hello! I have 2 variables - predictor "pred" and response variable "DV": pred<-c(439635.053, 222925.718, 668434.755, 194242.330, 5786.321, 115537.344, 100835.368, 7133.206, 159058.286, 4079991.629, 3380078.060, 2661279.136, 2698324.478, 1245213.965, 1901815.503, 1517019.451, 1396857.736, 1034030.988, 432249.574, 342329.325, 1831335.792, 2209578.859, 1641709.754,

Dear All, The function curve() draws the graph of functions from R to R. Is there some homologous function to curve() to draw functions from R^2 to R? Thanks in advance, Paul

Hello, I am using rbetabinom ( to generate beta binomial random variables) function available in the "emdbook"package written by Professor. Ben Bolker for my research study. I have no questions with this function. However, I am looking for the theoretical method/algorithm of the function "rbetabinom " . Morris (1997), American Naturalist 150:299-327 is given as the reference

I''m using the mongrel_cluster recipes for Capistrano as laid out by codahale.com and the new ed. of the Agile Development book, but I''m having problems on restart and stop: I can start: [root current]# mongrel_rails cluster::start Starting 3 Mongrel servers... And I can see 3 processes running: [root current]# ps aux | grep mongrel mongrel 1947 0.0 8.2 24684 10776 ?

Hello, I have a log likelihood function that I was able to optimize using mle2. I have two years of the data used to fit the function and I would like to fit both years simultaneously to test if the model parameter estimates differ between years, using likelihood ratio tests and AIC. Can anyone give advice on how to do this? My likelihood functions are long so I'll use the tadpole

I was advised someone might be able to help me with this. Very truly yours, Dwayne E. Culp, P.E., CFM Effective February 8, 2009, my contact information becomes: Dwayne E. Culp, P.E., CFM | JACOBS ENGINEERING GROUP : North American Infrastructure | Manager: Hydrology & Hydraulics Section | 5995 Rogerdale Road- B2047B | Houston, TX 77072 | 281-776-2109 | 832.351.7766 Fax |

I know I cannot be the only one who is not able to install the XML package from CRAN (zip or tar file) Many packages depend on this XML package. Can someone help me either access the source for a good binary? I have received no assistance from the author/developer of the package. Steven Steven D. Randolph Associate Consultant Enterprise Capabilities - Business Intelligence & Analytics Eli

Hey, So I have a scatter plot and I am trying to plot a curve to fit the data based on a Holling Type III functional response. My function is this: nll2<-function(a,b) { conefun<-(a*DBH^2)/(b^2+DBH^2) nlls2<-dnbinom(x=cones ,size=DBH, mu=conefun,log=TRUE) -sum(nlls) } and my plot is this: plot (DBH,cones) DBH is on the x-axis and cones is on the y-axis. How do I get the curve

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