ee.ConfusionMatrix

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

UsageReturns
ee.ConfusionMatrix(array, order)ConfusionMatrix
ArgumentTypeDetails
arrayObject

A square, 2D array of integers, representing the confusion matrix.

orderList, default: null

The 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.
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]]);
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.
var order = [11, 22, 42, 52, 71, 81];
print('Specified row/column labels (specified "order" parameter)',
      ee.ConfusionMatrix({array: array, order: order}).order());