お知らせ:
2025 年 4 月 15 日より前に Earth Engine の使用を登録したすべての非商用プロジェクトは、Earth Engine へのアクセスを維持するために
非商用目的での利用資格を確認する必要があります。
ee.Array.asin
コレクションでコンテンツを整理
必要に応じて、コンテンツの保存と分類を行います。
要素ごとに、入力の逆正弦（ラジアン単位）を計算します。
例
コードエディタ（JavaScript）
print(ee.Array([-1]).asin()); // [-π/2]
print(ee.Array([0]).asin()); // [0]
print(ee.Array([1]).asin()); // [π/2]
var start = -1;
var end = 1;
var points = ee.Array(ee.List.sequence(start, end, null, 50));
var values = points.asin();
// Plot asin() defined above.
var chart = ui.Chart.array.values(values, 0, points)
.setOptions({
viewWindow: {min: start, max: end},
hAxis: {
title: 'x',
viewWindowMode: 'maximized',
ticks: [
{v: start, f: start},
{v: 0, f: 0},
{v: end, f: end}]
},
vAxis: {
title: 'asin(x)',
ticks: [
{v: -Math.PI / 2, f: '-π/2'},
{v: 0, f: 0},
{v: Math.PI / 2, f: 'π/2'}]
},
lineWidth: 1,
pointSize: 0,
});
print(chart);
Python の設定
Python API とインタラクティブな開発での geemap の使用については、
Python 環境のページをご覧ください。
import ee
import geemap.core as geemap
Colab（Python）
import math
import altair as alt
import pandas as pd
display(ee.Array([-1]).asin()) # [-π/2]
display(ee.Array([0]).asin()) # [0]
display(ee.Array([1]).asin()) # [π/2]
start = -1
end = 1
points = ee.Array(ee.List.sequence(start, end, None, 50))
values = points.asin()
df = pd.DataFrame({'x': points.getInfo(), 'asin(x)': values.getInfo()})
# Plot asin() defined above.
alt.Chart(df).mark_line().encode(
x=alt.X('x', axis=alt.Axis(values=[start, 0, end])),
y=alt.Y('asin(x)', axis=alt.Axis(values=[-math.pi / 2, 0, math.pi / 2]))
)
特に記載のない限り、このページのコンテンツはクリエイティブ・コモンズの表示 4.0 ライセンスにより使用許諾されます。コードサンプルは Apache 2.0 ライセンスにより使用許諾されます。詳しくは、Google Developers サイトのポリシーをご覧ください。Java は Oracle および関連会社の登録商標です。
最終更新日 2025-07-26 UTC。
[null,null,["最終更新日 2025-07-26 UTC。"],[[["\u003cp\u003e\u003ccode\u003eArray.asin()\u003c/code\u003e calculates the arcsine of each element in an input array.\u003c/p\u003e\n"],["\u003cp\u003eThe function returns a new array with the calculated arcsine values in radians.\u003c/p\u003e\n"],["\u003cp\u003eInput values should be within the range of -1 to 1, inclusive.\u003c/p\u003e\n"],["\u003cp\u003eThe output values will be within the range of -π/2 to π/2 radians.\u003c/p\u003e\n"]]],["The `Array.asin()` function computes the arcsine of each element within an input array, returning the result in radians. The input array is specified as the `this` argument. The function is demonstrated with examples where inputs of -1, 0, and 1 yield outputs of -π/2, 0, and π/2, respectively. A sequence of points between -1 and 1, along with their corresponding arcsine values, are calculated and then visualized in a chart to show the relationship.\n"],null,["# ee.Array.asin\n\nOn an element-wise basis, computes the arcsine in radians of the input.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|----------------|---------|\n| Array.asin`()` | Array |\n\n| Argument | Type | Details |\n|---------------|-------|------------------|\n| this: `input` | Array | The input array. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\nprint(ee.Array([-1]).asin()); // [-π/2]\nprint(ee.Array([0]).asin()); // [0]\nprint(ee.Array([1]).asin()); // [π/2]\n\nvar start = -1;\nvar end = 1;\nvar points = ee.Array(ee.List.sequence(start, end, null, 50));\nvar values = points.asin();\n\n// Plot asin() defined above.\nvar chart = ui.Chart.array.values(values, 0, points)\n .setOptions({\n viewWindow: {min: start, max: end},\n hAxis: {\n title: 'x',\n viewWindowMode: 'maximized',\n ticks: [\n {v: start, f: start},\n {v: 0, f: 0},\n {v: end, f: end}]\n },\n vAxis: {\n title: 'asin(x)',\n ticks: [\n {v: -Math.PI / 2, f: '-π/2'},\n {v: 0, f: 0},\n {v: Math.PI / 2, f: 'π/2'}]\n },\n lineWidth: 1,\n pointSize: 0,\n });\nprint(chart);\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\nimport math\nimport altair as alt\nimport pandas as pd\n\ndisplay(ee.Array([-1]).asin()) # [-π/2]\ndisplay(ee.Array([0]).asin()) # [0]\ndisplay(ee.Array([1]).asin()) # [π/2]\n\nstart = -1\nend = 1\npoints = ee.Array(ee.List.sequence(start, end, None, 50))\nvalues = points.asin()\n\ndf = pd.DataFrame({'x': points.getInfo(), 'asin(x)': values.getInfo()})\n\n# Plot asin() defined above.\nalt.Chart(df).mark_line().encode(\n x=alt.X('x', axis=alt.Axis(values=[start, 0, end])),\n y=alt.Y('asin(x)', axis=alt.Axis(values=[-math.pi / 2, 0, math.pi / 2]))\n)\n```"]]
