Convert Spatial Weights Matrix to Table (Spatial Statistics)

Summary

Converts a binary spatial weights matrix file (.swm) to a table.

Illustration

Swm files may be converted to .dbf tables and edited.

Usage

• This tool allows you to edit a spatial weights matrix file, if necessary:

  • Create a spatial weights matrix file using the Generate Spatial Weights Matrix tool.
  • Convert the resultant spatial weights matrix file to a table using this tool.
  • Edit the table and modify the spatial relationships as desired.
  • Use the Generate Spatial Weights Matrix tool to convert the modified table back to the binary spatial weights matrix file format.

Syntax

arcpy.stats.ConvertSpatialWeightsMatrixtoTable(Input_Spatial_Weights_Matrix_File, Output_Table)

Parameter	Explanation	Data Type
Input_Spatial_Weights_Matrix_File	The full pathname for the spatial weights matrix file (.swm) you want to convert.	File
Output_Table	A full pathname to the table you want to create.	Table

Code sample

ConvertSpatialWeightsMatrixtoTable example 1 (Python window)

The following Python Window script demonstrates how to use the ConvertSpatialWeightsMatrixtoTable function.

import arcpy
arcpy.env.workspace = "c:/data"
arcpy.ConvertSpatialWeightsMatrixtoTable_stats("euclidean6Neighs.swm", "euclidean6Neighs.dbf")

ConvertSpatialWeightsMatrixtoTable example 2 (stand-alone script)

The following stand-alone Python script demonstrates how to use the ConvertSpatialWeightsMatrixtoTable function.

# Create a Spatial Weights Matrix based on Network Data 

# Import system modules
import arcpy

# Set property to overwrite existing output
arcpy.env.overwriteOutput = True

# Local variables...
workspace = r"C:\Data\USCounties\US"

# Set the current workspace (to avoid having to specify the full path to the 
# feature classes each time)
arcpy.env.workspace = workspace

# Create Spatial Weights Matrix 
# Process: Generate Spatial Weights Matrix... 
swm = arcpy.GenerateSpatialWeightsMatrix_stats("USCounties.shp", "MYID",
                                               "euclidean6Neighs.swm",
                                               "K_NEAREST_NEIGHBORS",
                                               "#", "#", "#", 6) 

# Dump Spatial Weights to Database Table
# Process: Convert Spatial Weights Matrix to Table...       
dbf = arcpy.ConvertSpatialWeightsMatrixtoTable_stats("euclidean6Neighs.swm",
                                                     "euclidean6Neighs.dbf")

# Now you can edit the spatial weights (add, subtract and alter
# neighbors and weights)

# Read weights from table back into Spatial Weights Matrix format
# Process: Generate Spatial Weights Matrix... 
swm = arcpy.GenerateSpatialWeightsMatrix_stats("USCounties.shp", "MYID",
                                               "euclidean6Neighs.swm",
                                               "CONVERT_TABLE",
                                               "#", "#", "#", "#", "#", "#",
                                               "euclidean6Neighs.dbf")

Environments

Current Workspace, Scratch Workspace

Licensing information

• Basic: Yes
• Standard: Yes
• Advanced: Yes