search for: pval2

Dear all, I am fitting a GLM similar to library(MASS) anorex.1 <- glm(Treat~Postwt+Prewt,family = binomial, data = anorexia) I have found two ways of computing the p-value of the fitted model: pval1 <- 1-pchisq(anorex.1$deviance,anorex.1$df.residual) pval2 <- 1-pchisq(anorex.1$null.deviance - anorex.1$deviance, anorex.1$df.null - anorex.1$df.residual) pval2 is testing LR chi2 from the null model, but what does pval1 says? Many thanks in advance, Dunia [[alternative HTML version deleted]]

...y<-sample(1:1000,20) > z<-sample(1:1000,20) > M1<-as.matrix( distance(x)) > M2 <-as.matrix( distance(y )) > M3<-as.matrix( distance(z )) > D1<-(lower(M1)) > D2<-(lower(M2)) > D3<-(lower(M3)) > mantel(D1 ~ D2+D3, nperm=1000) mantelr pval1 pval2 pval3 llim.2.5% ulim.97.5% 0.09014696 0.10300000 0.89800000 0.18400000 0.01857311 0.18468621 > partial.mantel.test(M1,M2,M3,quiet=T) $MantelR r12 r13 r23 r12.3 r13.2 0.08977575 0.02170997 -0.01561346 0.09014696 0.02320821 $p [1] 0.09590410 0.307...

Dear Dr.Goslee and anyone may intrested in matrix manipulate, I am using your ecodist to do mantel and partial mantel test, I have locality data and shape variation data, and the two distance matrixs are given as belowings. When I run the analysis, it is always report that the matrix is not square, but I didn't know what's wrong with my data. Would you please help me on this. I am quite

Hi, I was trying to evaluate the pearson correlation and the p-values for an nxm matrix, where each row represents a vector. One way to do it would be to iterate through each row, and find its correlation value( and the p-value) with respect to the other rows. Is there some function by which I can use the matrix as input? Ideally, the output would be an nxn matrix, containing the p-values