topic Re: Trouble with Generating Spatial Weights Matrix in Spatial Statistics Questions https://community.esri.com/t5/spatial-statistics-questions/trouble-with-generating-spatial-weights-matrix/m-p/636144#M2052 <HTML><HEAD></HEAD><BODY><SPAN>Hi Michelle, </SPAN><BR /><BR /><SPAN>Sorry that you are having trouble generating a Spatial Weights Matrix!!&nbsp; I have a couple of suggestions that may help.&nbsp; One suggestion is to try creating a new field of type Long, and calculate the field using the FID/OID.&nbsp; Then, and this is important, shut down ArcMap, then reopen it and try to use that new field you created.&nbsp; You may be having trouble with a bug that was fixed at 10.0 SP1 that involves empty selections after new fields are calculated.&nbsp; Closing down ArcMap seems to do the trick.&nbsp; And if you haven't installed 10.0 SP1 yet, I strongly encourage you to do that as well.</SPAN><BR /><BR /><SPAN>Another possibility is that the field that you are trying to use does not contain unique values?&nbsp; The Unique ID has to have a different value for each feature, which is why we suggest using either the FID or the OID for calculating your new UniqID field...just in case.</SPAN><BR /><BR /><SPAN>Sorry for the inconvenience!&nbsp; </SPAN><BR /><BR /><SPAN>Lauren Rosenshein</SPAN><BR /><SPAN>Geoprocessing Product Engineer</SPAN></BODY></HTML> Mon, 28 Feb 2011 22:13:24 GMT LaurenRosenshein 2011-02-28T22:13:24Z Trouble with Generating Spatial Weights Matrix https://community.esri.com/t5/spatial-statistics-questions/trouble-with-generating-spatial-weights-matrix/m-p/636143#M2051 <HTML><HEAD></HEAD><BODY><SPAN>Hi All - I would greatly appreciate a little help with this.&nbsp; I am trying to create a spatial weights matrix using polygon contiguity (queen); I am a little rusty and can't seem to figure out what I might be doing wrong, but when I load the input feature class into the SWM tool, no fields in the data come up as candidates for the Unique ID.&nbsp; The drop down menu for Unique ID just remains empty - I have even tried loading some of the ESRI .shp files and still nothing in the drop down menu.&nbsp; The .shp file contains the polygons (Census Tracts) plus some basic data about each tract (population by race, poverty).&nbsp; I created a new ID field (type Short Integer) and copied the FID into it when the tract ID wasn't showing up (thought maybe it was a data type mismatch problem since the tract ID is double), but still no luck.&nbsp; Please help!</SPAN><BR /><BR /><SPAN>Thanks,</SPAN><BR /><SPAN>Michelle</SPAN></BODY></HTML> Wed, 26 Jan 2011 15:20:58 GMT https://community.esri.com/t5/spatial-statistics-questions/trouble-with-generating-spatial-weights-matrix/m-p/636143#M2051 MichelleDebbink 2011-01-26T15:20:58Z Re: Trouble with Generating Spatial Weights Matrix https://community.esri.com/t5/spatial-statistics-questions/trouble-with-generating-spatial-weights-matrix/m-p/636144#M2052 <HTML><HEAD></HEAD><BODY><SPAN>Hi Michelle, </SPAN><BR /><BR /><SPAN>Sorry that you are having trouble generating a Spatial Weights Matrix!!&nbsp; I have a couple of suggestions that may help.&nbsp; One suggestion is to try creating a new field of type Long, and calculate the field using the FID/OID.&nbsp; Then, and this is important, shut down ArcMap, then reopen it and try to use that new field you created.&nbsp; You may be having trouble with a bug that was fixed at 10.0 SP1 that involves empty selections after new fields are calculated.&nbsp; Closing down ArcMap seems to do the trick.&nbsp; And if you haven't installed 10.0 SP1 yet, I strongly encourage you to do that as well.</SPAN><BR /><BR /><SPAN>Another possibility is that the field that you are trying to use does not contain unique values?&nbsp; The Unique ID has to have a different value for each feature, which is why we suggest using either the FID or the OID for calculating your new UniqID field...just in case.</SPAN><BR /><BR /><SPAN>Sorry for the inconvenience!&nbsp; </SPAN><BR /><BR /><SPAN>Lauren Rosenshein</SPAN><BR /><SPAN>Geoprocessing Product Engineer</SPAN></BODY></HTML> Mon, 28 Feb 2011 22:13:24 GMT https://community.esri.com/t5/spatial-statistics-questions/trouble-with-generating-spatial-weights-matrix/m-p/636144#M2052 LaurenRosenshein 2011-02-28T22:13:24Z