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ee.List.frequency
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
返回列表中与元素相等的元素的数量。
| 用法 | 返回 |
|---|
List.frequency(element) | 整数 |
| 参数 | 类型 | 详细信息 |
|---|
此：list | 列表 | |
element | 对象 | |
示例
代码编辑器 (JavaScript)
// An ee.Image list object.
var list = ee.List([0, 1, 2, 2, 3, 4]);
print('List of integers', list);
// The ee.List.frequency function is used to determine how many times a value is
// present in a list, e.g. what is the frequency of 0, 2, and 9 in the list.
print('Frequency of value 0', list.frequency(0));
print('Frequency of value 2', list.frequency(2));
print('Frequency of value 9', list.frequency(9));
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)
# An ee.Image list object.
ee_list = ee.List([0, 1, 2, 2, 3, 4])
print('List of integer:', ee_list.getInfo())
# The ee.List.frequency function is used to determine how many times a value is
# present in a list, e.g. what is the frequency of 0, 2, and 9 in the list.
print('Frequency of value 0:', ee_list.frequency(0).getInfo())
print('Frequency of value 2:', ee_list.frequency(2).getInfo())
print('Frequency of value 9:', ee_list.frequency(9).getInfo())
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最后更新时间 (UTC)：2025-07-26。
[null,null,["最后更新时间 (UTC)：2025-07-26。"],[[["\u003cp\u003e\u003ccode\u003eList.frequency()\u003c/code\u003e returns the number of times a specified element appears within an ee.List object.\u003c/p\u003e\n"],["\u003cp\u003eThis function takes the element to search for as an argument and returns an integer representing its frequency in the list.\u003c/p\u003e\n"],["\u003cp\u003eIt can be used with various data types, as demonstrated with integers in the provided examples.\u003c/p\u003e\n"]]],[],null,["# ee.List.frequency\n\nReturns the number of elements in list equal to element.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|---------------------------|---------|\n| List.frequency`(element)` | Integer |\n\n| Argument | Type | Details |\n|--------------|--------|---------|\n| this: `list` | List | |\n| `element` | Object | |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// An ee.Image list object.\nvar list = ee.List([0, 1, 2, 2, 3, 4]);\nprint('List of integers', list);\n\n// The ee.List.frequency function is used to determine how many times a value is\n// present in a list, e.g. what is the frequency of 0, 2, and 9 in the list.\nprint('Frequency of value 0', list.frequency(0));\nprint('Frequency of value 2', list.frequency(2));\nprint('Frequency of value 9', list.frequency(9));\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# An ee.Image list object.\nee_list = ee.List([0, 1, 2, 2, 3, 4])\nprint('List of integer:', ee_list.getInfo())\n\n# The ee.List.frequency function is used to determine how many times a value is\n# present in a list, e.g. what is the frequency of 0, 2, and 9 in the list.\nprint('Frequency of value 0:', ee_list.frequency(0).getInfo())\nprint('Frequency of value 2:', ee_list.frequency(2).getInfo())\nprint('Frequency of value 9:', ee_list.frequency(9).getInfo())\n```"]]
