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ee.Number.format
透過集合功能整理內容
你可以依據偏好儲存及分類內容。
使用 printf 樣式格式將數字轉換為字串。
用量 | 傳回 |
---|
Number.format(pattern) | 字串 |
引數 | 類型 | 詳細資料 |
---|
這個:number | 數字 | 要轉換為字串的數字。 |
pattern | 字串,預設值為「%s」 | printf 樣式的格式字串。舉例來說,'%.2f' 會產生格式為 '3.14' 的數字,而 '%05d' 會產生格式為 '00042' 的數字。格式字串必須符合下列條件:
- 零或多個前置字元。
- 只有一個「%」。
- 集合 [#-+ 0,(.\d] 中的零或多個修飾符字元。
- 集合 [sdoxXeEfgGaA] 中只能有一個轉換字元。
- 零或多個後置字元。
如要進一步瞭解格式字串,請參閱 https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Formatter.html |
範例
程式碼編輯器 (JavaScript)
print('Zero-fill to length of 3',
ee.Number(1).format('%03d')); // 001
print('Include 1 decimal place in 1.2347',
ee.Number(1.23476).format('%.1f')); // 1.2
print('Include 3 decimal places in 1.2347',
ee.Number(1.23476).format('%.3f')); // 1.235 (rounds up)
print('Scientific notation with 3 decimal places shown',
ee.Number(123476).format('%.3e')); // 1.235e+05 (rounds up)
print('Integer with 2 decimal places of precision',
ee.Number(123476).format('%.2f')); // 123476.00
Python 設定
請參閱
Python 環境頁面,瞭解 Python API 和如何使用 geemap
進行互動式開發。
import ee
import geemap.core as geemap
Colab (Python)
print('Zero-fill to length of 3:',
ee.Number(1).format('%03d').getInfo()) # 001
print('Include 1 decimal place in 1.2347:',
ee.Number(1.23476).format('%.1f').getInfo()) # 1.2
print('Include 3 decimal places in 1.2347:',
ee.Number(1.23476).format('%.3f').getInfo()) # 1.235 (rounds up)
print('Scientific notation with 3 decimal places shown:',
ee.Number(123476).format('%.3e').getInfo()) # 1.235e+05 (rounds up)
print('Integer with 2 decimal places of precision:',
ee.Number(123476).format('%.2f').getInfo()) # 123476.00
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上次更新時間:2025-07-26 (世界標準時間)。
[null,null,["上次更新時間:2025-07-26 (世界標準時間)。"],[[["\u003cp\u003e\u003ccode\u003eNumber.format()\u003c/code\u003e converts Earth Engine Numbers to strings using printf-style formatting.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003epattern\u003c/code\u003e argument accepts a format string, like '%.2f' for 2 decimal places or '%03d' for zero-padding to 3 digits.\u003c/p\u003e\n"],["\u003cp\u003eThis function allows customization of numeric output for display or further processing within Earth Engine scripts.\u003c/p\u003e\n"],["\u003cp\u003eRefer to the Java Formatter documentation for details on available format string options and syntax.\u003c/p\u003e\n"]]],[],null,["# ee.Number.format\n\nConvert a number to a string using printf-style formatting.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|------------------------------|---------|\n| Number.format`(`*pattern*`)` | String |\n\n| Argument | Type | Details |\n|----------------|-----------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| this: `number` | Number | The number to convert to a string. |\n| `pattern` | String, default: \"%s\" | A printf-style format string. For example, '%.2f' produces numbers formatted like '3.14', and '%05d' produces numbers formatted like '00042'. The format string must satisfy the following criteria: 1. Zero or more prefix characters. 2. Exactly one '%'. 3. Zero or more modifier characters in the set \\[#-+ 0,(.\\\\d\\]. 4. Exactly one conversion character in the set \\[sdoxXeEfgGaA\\]. 5. Zero or more suffix characters. For more about format strings, see https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Formatter.html |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\nprint('Zero-fill to length of 3',\n ee.Number(1).format('%03d')); // 001\n\nprint('Include 1 decimal place in 1.2347',\n ee.Number(1.23476).format('%.1f')); // 1.2\n\nprint('Include 3 decimal places in 1.2347',\n ee.Number(1.23476).format('%.3f')); // 1.235 (rounds up)\n\nprint('Scientific notation with 3 decimal places shown',\n ee.Number(123476).format('%.3e')); // 1.235e+05 (rounds up)\n\nprint('Integer with 2 decimal places of precision',\n ee.Number(123476).format('%.2f')); // 123476.00\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\nprint('Zero-fill to length of 3:',\n ee.Number(1).format('%03d').getInfo()) # 001\n\nprint('Include 1 decimal place in 1.2347:',\n ee.Number(1.23476).format('%.1f').getInfo()) # 1.2\n\nprint('Include 3 decimal places in 1.2347:',\n ee.Number(1.23476).format('%.3f').getInfo()) # 1.235 (rounds up)\n\nprint('Scientific notation with 3 decimal places shown:',\n ee.Number(123476).format('%.3e').getInfo()) # 1.235e+05 (rounds up)\n\nprint('Integer with 2 decimal places of precision:',\n ee.Number(123476).format('%.2f').getInfo()) # 123476.00\n```"]]