ee.List.filter

Filtert eine Liste auf die Elemente, die dem angegebenen Filter entsprechen. Wenn Sie Listenelemente filtern möchten, die keine Bilder oder Funktionen sind, testen Sie eine Property mit dem Namen „item“, z.B. ee.Filter.gt(„item“, 3).

Nutzung	Ausgabe
List.filter(filter)	Liste

Argument	Typ	Details
das: list	Liste
filter	Filter

Beispiele

Code-Editor (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))));

Python einrichten

Auf der Seite Python-Umgebung finden Sie Informationen zur Python API und zur Verwendung von geemap für die interaktive Entwicklung.

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.
display('List items equal to 3:',
        ee_list.filter(ee.Filter.eq('item', 3)))
display('List items greater than 4:',
        ee_list.filter(ee.Filter.gt('item', 4)))
display('List items not None:',
        ee_list.filter(ee.Filter.notNull(['item'])))
display('List items in another list:',
        ee_list.filter(ee.Filter.inList('item', [1, 98, 99])))
display('List items 3 ≤ 𝑥 ≤ 6:',
        ee_list.filter(ee.Filter.And(
            ee.Filter.gte('item', 3),
            ee.Filter.lte('item', 6))))