search for: nodefactor

...learned how to use the ergm and related packages. I generally get interesting results, but when I run a model including sociality and selective mixing effects for different groups, the model runs (and converges) but I get a warning as follows: mod <- ergm(network ~ edges + gwesp(0, fixed=T) + nodefactor("code") + nodematch("code", diff=T)+ nodecov("vulnEVI") + absdiff("vulnEVI")) Observed statistic(s) nodematch.code.5, nodematch.code.6, and nodematch.code.8 are at their smallest attainable values. Their coefficients will be fixed at -Inf. The model neverthe...

...ng <-network(mat,directed=FALSE) I then attach vertex names using commands like this: set.vertex.attribute(ng,"SchoolType",mSchType) where SchoolType can take six different/unique values. Then, I run ergm models successfully using commands like the following: m3 <- ergm(ng ~ edges+nodefactor("Gender")+nodefactor("SchoolType")) But if I try to run a command with the parameter nodematch, R crashes with no excuses and no error messages (I use windows Vista and the latest R version and all packages are fully updated). I use commands (and they crash) like the following:...

Dear colleagues, I have another question, which, I think cannot be answered easily by the manual. What is the effect of including both nodefactor("Gender") and nodematch("Gender",diff=TRUE)) for the same variable in the model? Judging from the output (please see below), you cant have estimates for both for boys and girls forthe nodematch command, but I thought that the nodematch measures for boys and girls were not relate...