ee.Date.difference

返回两个日期之间的差异（以指定单位表示）；结果为浮点值，基于相应单位的平均长度。

用法返回
Date.difference(start, unit)浮点数
参数类型详细信息
this：date日期
start日期
unit字符串可以选择“年”“月”“周”“日”“小时”“分钟”或“秒”。

示例

Code Editor (JavaScript)

// Demonstrates the ee.Date.difference method.

var DATE_1 = ee.Date('2020-01-01');
var DATE_2 = ee.Date('2020-01-15');

var diff_1 = DATE_2.difference(DATE_1, 'days');
var diff_2 = DATE_1.difference(DATE_2, 'weeks');

print('The difference between ',
      DATE_2,
      ' relative to ',
      DATE_1,
      ' is ',
      diff_1,
      ' days.');

print('The difference between ',
      DATE_1,
      ' relative to ',
      DATE_2,
      ' is ',
      diff_2,
      ' weeks.');

Python 设置

如需了解 Python API 以及如何使用 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)

DATE_1 = ee.Date('2020-01-01')
DATE_2 = ee.Date('2020-01-15')

# Format the dates as strings.
t1 = DATE_1.format('YYYY-MM-DD').getInfo()
t2 = DATE_2.format('YYYY-MM-DD').getInfo()

# Calculate the differences between dates.
diff_1 = DATE_2.difference(DATE_1, 'days').getInfo()
diff_2 = DATE_1.difference(DATE_2, 'weeks').getInfo()

print(f'The difference between {t2} relative to {t1} is {diff_1} days.')
print(f'The difference between {t1} relative to {t2} is {diff_2} weeks.')