[postgis-users] kmeans/natural breaks returns R_HOME error when called

[David William Bitner]

I don't quite remember the details too much, but I think that you need to
have R_HOME declared at the time you start postmaster, so if you change
R_HOME, you need to restart postmaster as well.

David

On 10/12/06, Jeff Cavner <jcavner at edac.unm.edu> wrote:
>
>  In a post for March 2006 David Bitner had a nifty SQL function using plr
> for natural breaks.  I have successfully installed R and plr in postgress
> and created the function in my database but when called with select
> kmeans(array[1,1,1,1,4,3,5,6,45,3,5,7,8,6,4,3,2,1,32,6,7,5,6,7,8],4);  to
> test it , it reports  ERROR:  environment variable R_HOME not defined
>
>
>
> I have noticed that when I run R from the command line I get the line
> ignoring the R_HOME variable.  When installing plr, I had problems with the
> make file finding R.h.  R.h lives in /usr/local/lib/R/include.  But when I
> looked at the plr makefile I noticed it was concatenating an extra /include
> onto the path.  So I set R_HOME using export R_HOME=/usr/local/lib/R (one
> directory up from the actual location of R.h)  since running my sql call
> to the kmeans function I have changed R_HOME back to the actual location of
> R.h.  No path setting for R_HOME seems to allow me to call the kmeans
> function.  Each returns the same R_HOME error. Does any body know where
> R_HOME is actually supposed to be set,e.g. to  the R.h, the .so, the
> /bin?   And if anyone has had this problem why R_HOME works for the plr
> install but not the actual execution of the function kmeans?
>
>
>
> Jeff Cavner
>
> Earth Data Analysis Center
>
> University of New Mexico
>
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>
>
>


-- 
************************************
David William Bitner
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