similar to: question on dispersion parameter

Hi, I am trying to fit a curve to data. My command line is: model10=nls(offspring~((A*c^k)/gamma(k))*((degdays-alpha)^(k-1))*exp(-c*(degdays-alpha)), start=list(A=30,k=2,c=.018,alpha=131)) I get the error message: Error in numericDeriv(form[[3]], names(ind), env) : Missing value or an infinity produced when evaluating the model In addition: Warning message: full precision was not

I have a large dataset grouped by a factor and I want to perform a regression on each data subset based on this factor. There are many ways to do this, posted here and elsewhere. I have tried several. However I found one method posted on the R wiki which works exactly as I want, and I like the elegance and simplicity of the solution, but I don't understand how it works. Its all in the formula

Hi every one, I am using the package 'drc' to model root elongation using dose response data. I don't know which model I should use. Though I don't know which model I should use, I tried the following codes given below. But it produced the error messages.Can any one tell me the code in 'drc' package to find out the EC (Effective Concentration) values and Confidence

Hi all, I recently loaded Samba 2.0.3 on AIX 4.3.2, everything seem to be working fine except that every now and then a user will be prompted that the username/password was incorrect. After trying to enter the username and password their domain accounts are locked. Up until this point they were connecting with out any problems. They will have their account reset and everything is ok again for a

Hi List, I recently upgraded one of our high-volume SMB servers from samba 3.x to samba 4.1.12 (also changing the OS). Now I have a strange problem. The CPU load on the server is very high, processes that are causing it are nslcd or since I changed to it sssd and the smbd processes themselves. ? Top looks like this: --------------------------------- PID USER????? PR? NI? VIRT? RES? SHR S

Hi Jan, After commit 2ca9fbd739b8a72b16dd790d0fff7b75f5488fb8 AMD IOMMU: allocate IRTE entries instead of using a static mapping, booting dom0 stalls several times. Sometimes this results in RCU stall warnings from the dom0 kernel, hitting the "any" key, on normal or serial console, makes the boot continue for a while but it stalls several times. (It also stalls on shutdown BTW) I have

Hello, I would like to extract the standard error for the coefficients returned when using survreg. Does anyone know how to do this? Thank you. Joan -- View this message in context: http://www.nabble.com/Extracting-standard-error-from-survreg--tp19994742p19994742.html Sent from the R help mailing list archive at Nabble.com.