Hi Jeremy,
newData<-data.frame(JVeg5=factor(Jdata[,"JVeg5"]),scale(Jdata[,c("Elevation","Lat_Y_pos","Coast_dist","Stream_dist")]))
Global <- polr(JVeg5 ~ Elevation + Lat_Y_pos + Coast_dist + Stream_dist,
data=newData, na.action = na.omit, Hess = TRUE)
summary(Global)
Does this still do what you want? At least it doesn't produce the error like
this.
greetings Jessi
On 09.07.2012, at 11:55, Jeremy Little wrote:
> 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 large (585000 rows) and has no NA, -9999 or blank values.
>
> My script (in brief) is as follows, with results:
>
> ############
>> library(MASS)
>>
>> ## ADD DATA
>> Jdata<- read.delim("/Analysis/20120709 JLittle data file.txt", header=T)
>>
>> attach(Jdata)
>> names(Jdata)
> [1] "POINTID" "Lat_Y_pos" "JVeg5" "Subregion" "Rock_U_Nam"
> "Rock_Name" "Elevation" "Slope" "Aspect" "Hillshade"
> "Stream_dist" "Coast_dist" "Coast_SE"
> [14] "Coast_E" "Wind_310" "TPI" "Landform"
>>
>> Global <- polr(JVeg5 ~ Elevation + Lat_Y_pos + Coast_dist + Stream_dist,
>> data=Jdata)
>>
>> summary(Global)
> Error in svd(X) : infinite or missing values in 'x'
>>
> ##Try with omit NA command
>> Global <- polr(JVeg5 ~ Elevation + Lat_Y_pos + Coast_dist + Stream_dist,
>> data=Jdata, na.action = na.omit, Hess = TRUE)
>>
>> summary(Global)
> Error in svd(X) : infinite or missing values in 'x'
> ############
>
> Does this imply an 'infinite value' and what would this mean?
>
> If anyone has any idea how to address this error, I would very much
> appreciate your response.
>
> Thank you in advance.
>
> Jeremy
>
> Date File Attachment (200 rows):
> http://r.789695.n4.nabble.com/file/n4635829/20120709_JLittle_data_file.txt
> 20120709_JLittle_data_file.txt
>
>
> --
> View this message in context:
> http://r.789695.n4.nabble.com/Package-MASS-polr-Error-in-svd-X-infinite-or-missing-values-in-x-tp4635829.html
> Sent from the R help mailing list archive at Nabble.com.
>
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