Re: [R] Package MuMIn (dredge): Error in ret[, ] <- cbind(x, se, rep(if (is.null(df)) NA_real_ else df, : number of items to replace is not a multiple of replacement length.

I have also reinstalled the MuMIn package as suggested at... http://r.789695.n4.nabble.com/Error-message-number-of-items-to-replace-is-not-a-multiple-of-replacement-length-td3257893.html ...however, this made no difference. any help is appreciated. thank you -- View this message in context: h

Re: [R] Package 'MASS' (polr): Error in svd(X) : infinite or missing values in 'x'

Thanks Jessi, your insights are extremely helpful. If you would indulge me one more quick question on your script. You have written... newData<-data.frame(JVeg5=factor(Jdata[,"JVeg5"]),scale(Jdata[,c("Elevation","Lat_Y_pos","Coast_dist","Stream_dist")])) I wish to expand this analysis for all ot

Re: [R] Package 'MASS' (polr): Error in svd(X) : infinite or missing values in 'x'

Dear Jessica thank you for the scale solution to my problem. I tried to manually scale my data (scaling up and removing decimals), however, this resulted in the same error message. It remains vague to me what the precise meaning of... "the model matrix should be sensibly scaled with all columns

[R] Package MuMIn (dredge): Error in ret[, ] <- cbind(x, se, rep(if (is.null(df)) NA_real_ else df, : number of items to replace is not a multiple of replacement length.

Hello R community, I am attempting to run multiple logistic regressions (multinomial, via package 'nnet'), with Automated Model Selection (dredge, package 'MuMIn'). The aim is to reduce the number of predictor variables by assessing relative performance of each variable, which can be done in a co

Re: [R] Package 'MASS' (polr): Error in svd(X) : infinite or missing values in 'x'

Hi Jessica, thank you for your prompt response. Yes I had deduced it had to do with the Hessian. However, I am not clear what "all columns having range the order of one" actually means and what this means for my data. Does this mean removing decimals (ie by shifting the decimal place)? I would h

[R] Package 'MASS' (polr): Error in svd(X) : infinite or missing values in 'x'

Hello, I am trying to run an ordinal logistic regression (polr) using the package 'MASS'. I have successfully run other regression classes (glm, multinom) without much problem, but with the 'polr' class I get the following error: " Error in svd(X) : infinite or missing values in 'x' " which appea