Calculate Best Matching Units

SOM Analyst

Calculate Best Matching Units

Creates a best matching unit file by projecting data onto a SOM.

ArcGIS Reference

../../_images/bmu.png

Parameters

SOM
The SOM on which to project data.
data to project
The data to project onto the SOM.
projected data
The ouput file to contain the projected data.
distance metric
The distance metric to use in projecting the data.
skip masked data vectors
Skip vectors that have been masked. Masking is done by begining vectors with a “x”, but this is not reccomended since SOM Analyst in several instances does matching based on line number.
read buffer
The number of lines to read at a time.

Code Reference

uiVisual.visual(cin, din, dout, noskip='#', buffer='#', path='\\bin\\SOM_PAK\\')

Creates a BMU file by projecting data onto a SOM.

Arguments :
cin

The input codebook file.

din

The input data file.

dout

The output BMU file.

noskip optional

Do not skip data vectors that have all components masked off.

buffer optional

A read buffer in number of lines size.