ee.List.filter

Memfilter daftar hanya ke elemen yang cocok dengan filter yang diberikan. Untuk memfilter item daftar yang bukan gambar atau fitur, uji properti bernama 'item', misalnya, ee.Filter.gt('item', 3).

Penggunaan	Hasil
List.filter(filter)	Daftar

Argumen	Jenis	Detail
ini: list	Daftar
filter	Filter

Contoh

Editor Kode (JavaScript)

// An ee.Image list object.
var list = ee.List([1, 2, 3, null, 6, 7]);

// Filter the list by a variety of conditions. Note that the property name
// 'item' is used to refer to list elements in ee.Filter functions.
print('List items equal to 3',
      list.filter(ee.Filter.eq('item', 3)));
print('List items greater than 4',
      list.filter(ee.Filter.gt('item', 4)));
print('List items not null',
      list.filter(ee.Filter.notNull(['item'])));
print('List items in another list',
      list.filter(ee.Filter.inList('item', [1, 98, 99])));
print('List items 3 ≤ 𝑥 ≤ 6',
      list.filter(ee.Filter.and(
        ee.Filter.gte('item', 3),
        ee.Filter.lte('item', 6))));

Penyiapan Python

Lihat halaman Lingkungan Python untuk mengetahui informasi tentang Python API dan penggunaan geemap untuk pengembangan interaktif.

import ee
import geemap.core as geemap

Colab (Python)

# An ee.Image list object.
ee_list = ee.List([1, 2, 3, None, 6, 7])

# Filter the list by a variety of conditions. Note that the property name
# 'item' is used to refer to list elements in ee.Filter functions.
print('List items equal to 3:',
      ee_list.filter(ee.Filter.eq('item', 3)).getInfo())
print('List items greater than 4:',
      ee_list.filter(ee.Filter.gt('item', 4)).getInfo())
print('List items not None:',
      ee_list.filter(ee.Filter.notNull(['item'])).getInfo())
print('List items in another list:',
      ee_list.filter(ee.Filter.inList('item', [1, 98, 99])).getInfo())
print('List items 3 ≤ 𝑥 ≤ 6:',
      ee_list.filter(ee.Filter.And(
          ee.Filter.gte('item', 3),
          ee.Filter.lte('item', 6))).getInfo())