code: def testLengthProcessedSampleSimple4DistanceMatrix(self):
      DbscanTestTemplates.templateLengthProcessDistanceMatrix(
          SIMPLE_SAMPLES.SAMPLE_SIMPLE4, 0.1, 0, 10, False
      )
      DbscanTestTemplates.templateLengthProcessDistanceMatrix(
          SIMPLE_SAMPLES.SAMPLE_SIMPLE4, 10, 65, 75, False
      )
  
imports: import unittest
  import matplotlib
  from pyclustering.cluster.tests.dbscan_templates import DbscanTestTemplates
  from pyclustering.cluster.dbscan import dbscan
  from pyclustering.samples.definitions import SIMPLE_SAMPLES, SIMPLE_ANSWERS
  from pyclustering.samples.definitions import FCPS_SAMPLES
label_desc: Use image node_id 26 for calling the DbscsanUnitTest obj's underlying member method code with example usage: obj.testLengthProcessedSampleSimple4DistanceMatrix() without return types