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ee.Array.firstNonZero

  • Array.firstNonZero(right) is a method that returns an Array.

  • This method selects the first value on an element-wise basis if it is non-zero and the second value otherwise.

  • It takes two Array arguments:left (the left-hand value) andright (the right-hand value).

 On an element-wise basis, selects the first value if it is non-zero, and the second value otherwise.

UsageReturns
Array.firstNonZero(right)Array
ArgumentTypeDetails
this:leftArrayThe left-hand value.
rightArrayThe right-hand value.

Examples

Code Editor (JavaScript)

varempty=ee.Array([],ee.PixelType.int8());print(empty.firstNonZero(empty));// []print(ee.Array([0]).firstNonZero(0));// [0]print(ee.Array([0]).firstNonZero([0]));// [0]print(ee.Array([0]).firstNonZero([1]));// [1]print(ee.Array([2]).firstNonZero([3]));// [2]print(ee.Array([1]).firstNonZero([0]));// [1]print(ee.Array([-1,0,1]).firstNonZero([2,-1,2]));// [-1,-1,1]// [[1,2],[3,4]]print(ee.Array([[1,2],[0,0]]).firstNonZero([[0,0],[3,4]]));

Python setup

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

importeeimportgeemap.coreasgeemap

Colab (Python)

empty=ee.Array([],ee.PixelType.int8())display(empty.firstNonZero(empty))# []display(ee.Array([0]).firstNonZero(0))# [0]display(ee.Array([0]).firstNonZero([0]))# [0]display(ee.Array([0]).firstNonZero([1]))# [1]display(ee.Array([2]).firstNonZero([3]))# [2]display(ee.Array([1]).firstNonZero([0]))# [1]display(ee.Array([-1,0,1]).firstNonZero([2,-1,2]))# [-1, -1, 1]# [[1, 2], [3, 4]]display(ee.Array([[1,2],[0,0]]).firstNonZero([[0,0],[3,4]]))

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Last updated 2023-10-06 UTC.