[Openspace] Re: Openspace Digest, Vol 65, Issue 3

[Myunghwa Hwang]

Hi, Pratik!

I am not sure about the function for making KNN weights symmetric,
however for reading GAL/GWT files in R you can use spdep R library.
And you can read the following tutorial to learn how to get your work done.
http://www.sal.uiuc.edu/stuff/stuff-sum/pdf/dataweights.pdf

from Myunghwa Hwang


On Tue, Sep 9, 2008 at 9:59 AM, <openspace-request at sal.uiuc.edu> wrote:

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>   1. Using KNN weights (Pratik Mhatre)
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> ---------- Forwarded message ----------
> From: "Pratik Mhatre" <pcmhatre at tamu.edu>
> To: openspace at sal.uiuc.edu
> Date: Mon, 8 Sep 2008 16:25:19 -0500
> Subject: [Openspace] Using KNN weights
> Hi,
>
> I read about the problem that KNN weights can pose in GeoDa. The FAQ on the
> website suggests using R to make the weights symmetric. I've downloaded and
> installed R but am unable to read in the .GWT file that GeoDa creates. Can
> anyone describe the exact process after creating the weights file in GeoDA?
> How do I go about reading in the weights file in R, making it symmetric,
> and
> then exporting it back to .GAL or GWT format? Thanks in advance.
>
> regards,
> Pratik
>
>
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