Pengumuman: Semua project nonkomersial yang terdaftar untuk menggunakan Earth Engine sebelum
15 April 2025 harus
memverifikasi kelayakan nonkomersial untuk mempertahankan akses Earth Engine.
ee.Array.accum
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Mengakumulasi elemen array di sepanjang sumbu yang diberikan, dengan menyetel setiap elemen hasil ke pengurangan elemen di sepanjang sumbu tersebut hingga dan termasuk posisi saat ini. Dapat digunakan untuk membuat jumlah kumulatif, urutan yang meningkat secara monoton, dll.
| Penggunaan | Hasil |
|---|
Array.accum(axis, reducer) | Array |
| Argumen | Jenis | Detail |
|---|
ini: array | Array | Array yang akan diakumulasikan. |
axis | Bilangan Bulat | Sumbu yang digunakan untuk melakukan akumulasi. |
reducer | Pengurang, default: null | Pengurangan untuk mengakumulasi nilai. Defaultnya adalah SUM, untuk menghasilkan jumlah kumulatif setiap vektor di sepanjang sumbu yang diberikan. |
Contoh
Code Editor (JavaScript)
print(ee.Array([-1]).accum(0)); // [-1]
print(ee.Array([-2, 1]).accum(0)); // [-2, -1]
print(ee.Array([-2, 1, 9]).accum(0)); // [-2, -1, 8]
// accum over 2D arrays with different axes.
print(ee.Array([[1, 3], [5, 7]]).accum(0)); // [[1,3],[6,10]]
print(ee.Array([[1, 3], [5, 7]]).accum(1)); // [[1,4],[5,12]]
// sum is the default reducer.
print(ee.Array([2, -2, 3, 1]).accum(0)); // [2,0,3,4]
print(ee.Array([2, -2, 3, 1]).accum(0, ee.Reducer.sum())); // [2,0,3,4]
// Some example reducers.
print(ee.Array([2, -2, 3, 1]).accum(0, ee.Reducer.max())); // [2,2,3,3]
print(ee.Array([2, -2, 3, 1]).accum(0, ee.Reducer.mean())); // [2,0,1,1]
print(ee.Array([2, -2, 3, 1]).accum(0, ee.Reducer.min())); // [2,-2,-2,-2]
print(ee.Array([2, -2, 3]).accum(0, ee.Reducer.product())); // [2,-4,-12]
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)
display(ee.Array([-1]).accum(0)) # [-1]
display(ee.Array([-2, 1]).accum(0)) # [-2, -1]
display(ee.Array([-2, 1, 9]).accum(0)) # [-2, -1, 8]
# accum over 2D arrays with different axes.
display(ee.Array([[1, 3], [5, 7]]).accum(0)) # [[1, 3],[6, 10]]
display(ee.Array([[1, 3], [5, 7]]).accum(1)) # [[1, 4],[5, 12]]
# sum is the default reducer.
display(ee.Array([2, -2, 3, 1]).accum(0)) # [2, 0, 3, 4]
# [2, 0, 3, 4]
display(ee.Array([2, -2, 3, 1]).accum(0, ee.Reducer.sum()))
# Some example reducers.
# [2, 2, 3, 3]
display(ee.Array([2, -2, 3, 1]).accum(0, ee.Reducer.max()))
# [2, 0, 1, 1]
display(ee.Array([2, -2, 3, 1]).accum(0, ee.Reducer.mean()))
# [2, -2, -2, -2]
display(ee.Array([2, -2, 3, 1]).accum(0, ee.Reducer.min()))
# [2, -4, -12]
display(ee.Array([2, -2, 3]).accum(0, ee.Reducer.product()))
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\u003eArray.accum\u003c/code\u003e calculates the cumulative reduction of elements in an array along a specified axis.\u003c/p\u003e\n"],["\u003cp\u003eIt uses a reducer function, defaulting to sum, to determine how elements are accumulated.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eaxis\u003c/code\u003e argument defines the direction of accumulation (0 for rows, 1 for columns in 2D arrays).\u003c/p\u003e\n"],["\u003cp\u003eVarious reducers like \u003ccode\u003emin\u003c/code\u003e, \u003ccode\u003emax\u003c/code\u003e, \u003ccode\u003emean\u003c/code\u003e, and \u003ccode\u003eproduct\u003c/code\u003e can be used for different cumulative calculations.\u003c/p\u003e\n"],["\u003cp\u003eThe result is a new array with the same dimensions as the input, containing the accumulated values.\u003c/p\u003e\n"]]],[],null,["# ee.Array.accum\n\nAccumulates elements of an array along the given axis, by setting each element of the result to the reduction of elements along that axis up to and including the current position. May be used to make a cumulative sum, a monotonically increasing sequence, etc.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|----------------------------------|---------|\n| Array.accum`(axis, `*reducer*`)` | Array |\n\n| Argument | Type | Details |\n|---------------|------------------------|------------------------------------------------------------------------------------------------------------------|\n| this: `array` | Array | Array to accumulate. |\n| `axis` | Integer | Axis along which to perform the accumulation. |\n| `reducer` | Reducer, default: null | Reducer to accumulate values. Default is SUM, to produce the cumulative sum of each vector along the given axis. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\nprint(ee.Array([-1]).accum(0)); // [-1]\nprint(ee.Array([-2, 1]).accum(0)); // [-2, -1]\nprint(ee.Array([-2, 1, 9]).accum(0)); // [-2, -1, 8]\n\n// accum over 2D arrays with different axes.\nprint(ee.Array([[1, 3], [5, 7]]).accum(0)); // [[1,3],[6,10]]\nprint(ee.Array([[1, 3], [5, 7]]).accum(1)); // [[1,4],[5,12]]\n\n// sum is the default reducer.\nprint(ee.Array([2, -2, 3, 1]).accum(0)); // [2,0,3,4]\nprint(ee.Array([2, -2, 3, 1]).accum(0, ee.Reducer.sum())); // [2,0,3,4]\n\n// Some example reducers.\nprint(ee.Array([2, -2, 3, 1]).accum(0, ee.Reducer.max())); // [2,2,3,3]\nprint(ee.Array([2, -2, 3, 1]).accum(0, ee.Reducer.mean())); // [2,0,1,1]\nprint(ee.Array([2, -2, 3, 1]).accum(0, ee.Reducer.min())); // [2,-2,-2,-2]\nprint(ee.Array([2, -2, 3]).accum(0, ee.Reducer.product())); // [2,-4,-12]\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\ndisplay(ee.Array([-1]).accum(0)) # [-1]\ndisplay(ee.Array([-2, 1]).accum(0)) # [-2, -1]\ndisplay(ee.Array([-2, 1, 9]).accum(0)) # [-2, -1, 8]\n\n# accum over 2D arrays with different axes.\ndisplay(ee.Array([[1, 3], [5, 7]]).accum(0)) # [[1, 3],[6, 10]]\ndisplay(ee.Array([[1, 3], [5, 7]]).accum(1)) # [[1, 4],[5, 12]]\n\n# sum is the default reducer.\ndisplay(ee.Array([2, -2, 3, 1]).accum(0)) # [2, 0, 3, 4]\n\n# [2, 0, 3, 4]\ndisplay(ee.Array([2, -2, 3, 1]).accum(0, ee.Reducer.sum()))\n\n\n# Some example reducers.\n# [2, 2, 3, 3]\ndisplay(ee.Array([2, -2, 3, 1]).accum(0, ee.Reducer.max()))\n\n\n# [2, 0, 1, 1]\ndisplay(ee.Array([2, -2, 3, 1]).accum(0, ee.Reducer.mean()))\n\n# [2, -2, -2, -2]\ndisplay(ee.Array([2, -2, 3, 1]).accum(0, ee.Reducer.min()))\n\n# [2, -4, -12]\ndisplay(ee.Array([2, -2, 3]).accum(0, ee.Reducer.product()))\n```"]]
