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ee.ConfusionMatrix

  • A ConfusionMatrix is created from a square, 2D array of integers where rows represent actual values and columns represent predicted values.

  • Theorder parameter can be used to specify custom class labels for the rows and columns.

  • If theorder parameter is not specified, the class labels are assumed to be a 0-based sequence.

 Creates a confusion matrix. Axis 0 (the rows) of the matrix correspond to the actual values, and Axis 1 (the columns) to the predicted values.

UsageReturns
ee.ConfusionMatrix(array,order)ConfusionMatrix
ArgumentTypeDetails
arrayObjectA square, 2D array of integers, representing the confusion matrix. Note that unlike the ee.Array constructor, this argument cannot take a list.
orderList, default: nullThe row and column size and order, for non-contiguous or non-zero based matrices.

Examples

Code Editor (JavaScript)

// A confusion matrix. Rows correspond to actual values, columns to// predicted values.vararray=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]]);print('Constructed confusion matrix',ee.ConfusionMatrix(array));// The "order" parameter refers to row and column class labels. When// unspecified, the class labels are assumed to be a 0-based sequence// incrementing by 1 with a length equal to row/column size.print('Default row/column labels (unspecified "order" parameter)',ee.ConfusionMatrix({array:array,order:null}).order());// Set the "order" parameter when custom class label integers are required. The// list of integer value labels should correspond to the matrix axes left to// right / top to bottom.varorder=[11,22,42,52,71,81];print('Specified row/column labels (specified "order" parameter)',ee.ConfusionMatrix({array:array,order:order}).order());

Python setup

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

importeeimportgeemap.coreasgeemap

Colab (Python)

# A confusion matrix. Rows correspond to actual values, columns to# predicted values.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]])display('Constructed confusion matrix:',ee.ConfusionMatrix(array))# The "order" parameter refers to row and column class labels. When# unspecified, the class labels are assumed to be a 0-based sequence# incrementing by 1 with a length equal to row/column size.display('Default row/column labels (unspecified "order" parameter):',ee.ConfusionMatrix(array,None).order())# Set the "order" parameter when custom class label integers are required. The# list of integer value labels should correspond to the matrix axes left to# right / top to bottom.order=[11,22,42,52,71,81]display('Specified row/column labels (specified "order" parameter):',ee.ConfusionMatrix(array,order).order())

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Last updated 2024-09-19 UTC.