Displaying 3 results from an estimated 3 matches for "coast_distance".
2012 Jul 09
3
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 appears when I run the "summary" command.
The data file is
2012 Oct 07
2
gam error message: matrix not +ve definite
...acity.
The version of mgcv(1.7-21) and R (2.15.1) is the same on both machines.
The data set to which the model if fitted is too large to post here but it
contains 2209 observations, and the model is of the form: gam(Response~Year
+ s(Dayofyear,k=5,bs='cc') + s(Longitude,Latitude,k=4) +
s(Coast_distance,k=4), family=Gamma('log'), data=dat, gamma=1.4)
I realize this is a very particular question, but any help would be really
appreciated.
Thanks,
Dan.
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2012 Jul 11
1
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 coarse fashion using
the Automated Model Selection option in package 'MuMIn'