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ee.Array.argmax
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返回数组中最大值的位置（以每个数组轴中的索引列表表示），如果数组为空，则返回 null。如果最大值出现多次，则返回第一个最大值的位置。
示例
代码编辑器 (JavaScript)
// Return the position of the maximum value in each dimension.
// Returns null if the array is empty.
print(ee.Array([], ee.PixelType.int8()).argmax()); // null
print(ee.Array([9]).argmax()); // [0]
print(ee.Array([0, -1, 2, 1]).argmax()); // [2]
print(ee.Array([[3, 4, 2], [6, 5, 7]]).argmax()); // [1, 2]
// Returns the first occurrence of the maximum.
print(ee.Array([1, 1, 1, 9, 9, 9]).argmax()); // [3]
Python 设置
如需了解 Python API 和如何使用 geemap 进行交互式开发，请参阅
Python 环境页面。
import ee
import geemap.core as geemap
Colab (Python)
# Return the position of the maximum value in each dimension.
# Returns null if the array is empty.
display(ee.Array([], ee.PixelType.int8()).argmax()) # None
display(ee.Array([9]).argmax()) # [0]
display(ee.Array([0, -1, 2, 1]).argmax()) # [2]
display(ee.Array([[3, 4, 2], [6, 5, 7]]).argmax()) # [1, 2]
# Returns the first occurrence of the maximum.
display(ee.Array([1, 1, 1, 9, 9, 9]).argmax()) # [3]
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最后更新时间 (UTC)：2025-07-27。
[null,null,["最后更新时间 (UTC)：2025-07-27。"],[[["\u003cp\u003e\u003ccode\u003eArray.argmax()\u003c/code\u003e returns the position of the maximum value within an array as a list of indices.\u003c/p\u003e\n"],["\u003cp\u003eIf multiple maximum values exist, the function returns the position of the first occurrence.\u003c/p\u003e\n"],["\u003cp\u003eAn empty array input results in a \u003ccode\u003enull\u003c/code\u003e (JavaScript) or \u003ccode\u003eNone\u003c/code\u003e (Python) output.\u003c/p\u003e\n"],["\u003cp\u003eThe function operates across all dimensions of the input array.\u003c/p\u003e\n"]]],["The `argmax()` function finds the position of the maximum value within an array. It returns a list of indices, representing the location in each array dimension. If the array is empty, it returns null. In cases of multiple maximum values, it returns the index of the first occurrence. Usage is `Array.argmax()`, and it takes one array argument. Examples illustrate its behavior with empty, single-value, multi-value, and multi-dimensional arrays.\n"],null,["# ee.Array.argmax\n\nReturns the position, as a list of indices in each array axis, of the maximum value in an array, or null if the array is empty. If there are multiple occurrences of the maximum, returns the position of the first.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|------------------|---------|\n| Array.argmax`()` | List |\n\n| Argument | Type | Details |\n|---------------|-------|---------|\n| this: `array` | Array | |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Return the position of the maximum value in each dimension.\n\n// Returns null if the array is empty.\nprint(ee.Array([], ee.PixelType.int8()).argmax()); // null\n\nprint(ee.Array([9]).argmax()); // [0]\nprint(ee.Array([0, -1, 2, 1]).argmax()); // [2]\nprint(ee.Array([[3, 4, 2], [6, 5, 7]]).argmax()); // [1, 2]\n\n// Returns the first occurrence of the maximum.\nprint(ee.Array([1, 1, 1, 9, 9, 9]).argmax()); // [3]\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\n# Return the position of the maximum value in each dimension.\n\n# Returns null if the array is empty.\ndisplay(ee.Array([], ee.PixelType.int8()).argmax()) # None\n\ndisplay(ee.Array([9]).argmax()) # [0]\ndisplay(ee.Array([0, -1, 2, 1]).argmax()) # [2]\ndisplay(ee.Array([[3, 4, 2], [6, 5, 7]]).argmax()) # [1, 2]\n\n# Returns the first occurrence of the maximum.\ndisplay(ee.Array([1, 1, 1, 9, 9, 9]).argmax()) # [3]\n```"]]
