Hi.
As you might know, most of Jenks' optimization method
depends on Fischer's "EXACT OPTIMIZATION" METHOD in
(Fisher, W. D., 1958, On grouping for maximum homogeneity.
Journal of the American Statistical Association, 53, 789
・98.).
This source code is available from following CMU's
statlib sit
On Fri, 24 Feb 2006, David Bitner wrote:
> Most of my problem is that this is my first time using R, so I just
> don't know the functions (or even really the semantic differences) for
> dealing with vectors,arrays, and matrices.
They are all vectors, but arrays and matrices have dimension attribu
Most of my problem is that this is my first time using R, so I just
don't know the functions (or even really the semantic differences) for
dealing with vectors,arrays, and matrices.
Thank you very much for the code sample. I have been looking around,
is there a good basic reference online to find
On Fri, 24 Feb 2006, David Bitner wrote:
> I was actually already using that paper as a resource, but I am still
> not quite understanding how to get just the breaks that I can use for
> classification in an external mapping application.
>
> Right now I am trying out some samples just to understa
I was actually already using that paper as a resource, but I am still
not quite understanding how to get just the breaks that I can use for
classification in an external mapping application.
Right now I am trying out some samples just to understand what's going on.
Using this array:
a<-c(11,1,3,3
On Fri, 24 Feb 2006, David Bitner wrote:
> I am trying to create some type of a Natural Breaks Classification in
> PL/R to classify data that I have in a PostgreSQL/PostGIS database.
> All that I really need so that I can pass information on to Mapserver
> to display this data is the class break
I am trying to create some type of a Natural Breaks Classification in
PL/R to classify data that I have in a PostgreSQL/PostGIS database.
All that I really need so that I can pass information on to Mapserver
to display this data is the class break values (ie an array [3,5,7,9]
would mean show val
