ee.ConfusionMatrix.order

  • The ConfusionMatrix.order() method returns the name and order of the rows and columns of a confusion matrix as a list.

  • This method can be used to retrieve the default order or a specified order assigned during the confusion matrix creation.

  • The examples demonstrate how to use order() in both JavaScript and Python with confusion matrices constructed from arrays.

 Returns the name and order of the rows and columns of the matrix.

UsageReturns
ConfusionMatrix.order()List
ArgumentTypeDetails
this: confusionMatrixConfusionMatrix

Examples

Code Editor (JavaScript)

// Construct an error/confusion matrix from an array (rows are actual values,
// columns are predicted values). We construct an error matrix here for brevity
// and matrix visualization, in most applications the confusion matrix will be
// generated from ee.Classifier.confusionMatrix.
var array = ee.Array([[32, 0, 0,  0,  1, 0],
                      [ 0, 5, 0,  0,  1, 0],
                      [ 0, 0, 1,  3,  0, 0],
                      [ 0, 1, 4, 26,  8, 0],
                      [ 0, 0, 0,  7, 15, 0],
                      [ 0, 0, 0,  1,  0, 5]]);

var cmDefaultOrder = ee.ConfusionMatrix(array);
print('Default name and order of the rows and columns',
      cmDefaultOrder.order());

var order = [11, 22, 42, 52, 71, 81];
var cmSpecifiedOrder = ee.ConfusionMatrix({array: array, order: order});
print('Specified name and order of the rows and columns',
      cmSpecifiedOrder.order());

Python setup

See the Python Environment page for information on the Python API and using geemap for interactive development.

import ee
import geemap.core as geemap

Colab (Python)

# Construct an error/confusion matrix from an array (rows are actual values,
# columns are predicted values). We construct an error matrix here for brevity
# and matrix visualization, in most applications the confusion matrix will be
# generated from ee.Classifier.confusionMatrix.
array = ee.Array([[32, 0, 0,  0,  1, 0],
                  [ 0, 5, 0,  0,  1, 0],
                  [ 0, 0, 1,  3,  0, 0],
                  [ 0, 1, 4, 26,  8, 0],
                  [ 0, 0, 0,  7, 15, 0],
                  [ 0, 0, 0,  1,  0, 5]])

cm_default_order = ee.ConfusionMatrix(array)
print('Default name and order of the rows and columns:',
      cm_default_order.order().getInfo())

order = [11, 22, 42, 52, 71, 81]
cm_specified_order = ee.ConfusionMatrix(array, order)
print('Specified name and order of the rows and columns:',
      cm_specified_order.order().getInfo())