Pengumuman: Semua project nonkomersial yang terdaftar untuk menggunakan Earth Engine sebelum
15 April 2025 harus
memverifikasi kelayakan nonkomersial untuk mempertahankan akses Earth Engine.
ee.Algorithms.If
Tetap teratur dengan koleksi
Simpan dan kategorikan konten berdasarkan preferensi Anda.
Memilih salah satu inputnya berdasarkan kondisi, mirip dengan konstruksi if-then-else.
| Penggunaan | Hasil |
|---|
ee.Algorithms.If(condition, trueCase, falseCase) | Objek |
| Argumen | Jenis | Detail |
|---|
condition | Objek, default: null | Kondisi yang menentukan hasil mana yang ditampilkan. Jika bukan boolean, nilai ini akan ditafsirkan sebagai boolean berdasarkan aturan berikut:
- Angka yang sama dengan 0 atau NaN adalah salah (false).
- String, daftar, dan kamus kosong adalah salah (false).
- Null adalah salah (false).
- Semua hal lainnya benar.
|
trueCase | Objek, default: null | Hasil yang ditampilkan jika kondisi benar. |
falseCase | Objek, default: null | Hasil yang akan ditampilkan jika kondisi salah. |
Contoh
Code Editor (JavaScript)
print(ee.Algorithms.If(false, '*true*', '*false*')); // The string "*false*"
print(ee.Algorithms.If(true, '*true*', '*false*')); // The string "*true*"
// Consider using remap rather than If for tasks like numbers for classes.
print(ee.Algorithms.If(ee.String('Tree').compareTo('Tree'), 0, 1));
print(ee.Algorithms.If(ee.String('NotTree').compareTo('Tree'), 0, 1));
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)
# The string "*false*"
print(ee.Algorithms.If(False, '*true*', '*false*').getInfo())
# The string "*true*"
print(ee.Algorithms.If(True, '*true*', '*false*').getInfo())
# Consider using remap rather than If for tasks like numbers for classes.
print(ee.Algorithms.If(ee.String('Tree').compareTo('Tree'), 0, 1).getInfo())
print(ee.Algorithms.If(ee.String('NotTree').compareTo('Tree'), 0, 1).getInfo())
Kecuali dinyatakan lain, konten di halaman ini dilisensikan berdasarkan Lisensi Creative Commons Attribution 4.0, sedangkan contoh kode dilisensikan berdasarkan Lisensi Apache 2.0. Untuk mengetahui informasi selengkapnya, lihat Kebijakan Situs Google Developers. Java adalah merek dagang terdaftar dari Oracle dan/atau afiliasinya.
Terakhir diperbarui pada 2025-07-26 UTC.
[null,null,["Terakhir diperbarui pada 2025-07-26 UTC."],[[["\u003cp\u003e\u003ccode\u003eee.Algorithms.If\u003c/code\u003e selects one of two input values based on a given condition, similar to an if-then-else statement.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003econdition\u003c/code\u003e input determines the output, treating non-boolean values as true or false based on specific rules (e.g., 0 is false, empty strings are false).\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003etrueCase\u003c/code\u003e and \u003ccode\u003efalseCase\u003c/code\u003e represent the values returned when the condition is true or false, respectively.\u003c/p\u003e\n"],["\u003cp\u003eWhile \u003ccode\u003eee.Algorithms.If\u003c/code\u003e is versatile, using \u003ccode\u003eremap\u003c/code\u003e might be more efficient for tasks like assigning numerical values to classes.\u003c/p\u003e\n"]]],["The `ee.Algorithms.If` function selects one of two inputs based on a condition. It takes a `condition`, `trueCase`, and `falseCase`. If the `condition` is true, it returns `trueCase`; otherwise, it returns `falseCase`. Non-boolean conditions are evaluated: 0, NaN, empty collections, and null are false; everything else is true. Examples show using boolean values and string comparisons as conditions to determine the returned value. The `remap` function is suggested as an alternative for class-numbering tasks.\n"],null,["# ee.Algorithms.If\n\nSelects one of its inputs based on a condition, similar to an if-then-else construct.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|------------------------------------------------------------------|---------|\n| `ee.Algorithms.If(`*condition* `, `*trueCase* `, `*falseCase*`)` | Object |\n\n| Argument | Type | Details |\n|-------------|-----------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `condition` | Object, default: null | The condition that determines which result is returned. If this is not a boolean, it is interpreted as a boolean by the following rules: - Numbers that are equal to 0 or a NaN are false. - Empty strings, lists and dictionaries are false. - Null is false. - Everything else is true. |\n| `trueCase` | Object, default: null | The result to return if the condition is true. |\n| `falseCase` | Object, default: null | The result to return if the condition is false. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\nprint(ee.Algorithms.If(false, '*true*', '*false*')); // The string \"*false*\"\nprint(ee.Algorithms.If(true, '*true*', '*false*')); // The string \"*true*\"\n\n// Consider using remap rather than If for tasks like numbers for classes.\nprint(ee.Algorithms.If(ee.String('Tree').compareTo('Tree'), 0, 1));\nprint(ee.Algorithms.If(ee.String('NotTree').compareTo('Tree'), 0, 1));\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# The string \"*false*\"\nprint(ee.Algorithms.If(False, '*true*', '*false*').getInfo())\n\n# The string \"*true*\"\nprint(ee.Algorithms.If(True, '*true*', '*false*').getInfo())\n\n# Consider using remap rather than If for tasks like numbers for classes.\nprint(ee.Algorithms.If(ee.String('Tree').compareTo('Tree'), 0, 1).getInfo())\nprint(ee.Algorithms.If(ee.String('NotTree').compareTo('Tree'), 0, 1).getInfo())\n```"]]
