ee.Array.cos
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Calcule le cosinus de l'entrée en radians, élément par élément.
Utilisation | Renvoie |
---|
Array.cos() | Tableau |
Argument | Type | Détails |
---|
ceci : input | Tableau | Tableau d'entrée. |
Exemples
Éditeur de code (JavaScript)
var π = Math.PI;
print(ee.Array([-π]).cos()); // [-1]
print(ee.Array([-π / 2.0]).cos()); // [Almost zero]
print(ee.Array([0]).cos()); // [1]
print(ee.Array([π / 2.0]).cos()); // [Almost zero]
print(ee.Array([π]).cos()); // [-1]
var start = -π;
var end = π;
var points = ee.Array(ee.List.sequence(start, end, null, 50));
var values = points.cos();
// Plot cos() 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: '-π'},
{v: 0, f: 0},
{v: end, f: 'π'}]
},
vAxis: {
title: 'cos(x)',
ticks: [
{v: -1, f: -1},
{v: 0, f: 0},
{v: 1, f: 1}]
},
lineWidth: 1,
pointSize: 0,
});
print(chart);
Configuration de Python
Consultez la page
Environnement Python pour en savoir plus sur l'API Python et sur l'utilisation de geemap
pour le développement interactif.
import ee
import geemap.core as geemap
Colab (Python)
import math
import altair as alt
import pandas as pd
π = math.pi
display(ee.Array([-π]).cos()) # [-1]
display(ee.Array([-π / 2.0]).cos()) # [Almost zero]
display(ee.Array([0]).cos()) # [1]
display(ee.Array([π / 2.0]).cos()) # [Almost zero]
display(ee.Array([π]).cos()) # [-1]
start = -π
end = π
points = ee.Array(ee.List.sequence(start, end, None, 50))
values = points.cos()
df = pd.DataFrame({'x': points.getInfo(), 'cos(x)': values.getInfo()})
# Plot cos() defined above.
alt.Chart(df).mark_line().encode(
x=alt.X('x', axis=alt.Axis(values=[start, 0, end])),
y=alt.Y('cos(x)', axis=alt.Axis(values=[-1, 0, 1]))
)
Sauf indication contraire, le contenu de cette page est régi par une licence Creative Commons Attribution 4.0, et les échantillons de code sont régis par une licence Apache 2.0. Pour en savoir plus, consultez les Règles du site Google Developers. Java est une marque déposée d'Oracle et/ou de ses sociétés affiliées.
Dernière mise à jour le 2025/07/27 (UTC).
[null,null,["Dernière mise à jour le 2025/07/27 (UTC)."],[[["\u003cp\u003eCalculates the cosine of each element within an input array, with the input values expected to be in radians.\u003c/p\u003e\n"],["\u003cp\u003eReturns a new array containing the cosine results, maintaining the structure of the input array.\u003c/p\u003e\n"],["\u003cp\u003eUtilizes the standard mathematical definition of cosine, producing results ranging from -1 to 1.\u003c/p\u003e\n"],["\u003cp\u003eCan be applied to single values or large arrays for efficient trigonometric computations in Earth Engine.\u003c/p\u003e\n"],["\u003cp\u003eUsage examples are provided in JavaScript and Python environments with visualizations to aid in comprehension.\u003c/p\u003e\n"]]],[],null,["# ee.Array.cos\n\nOn an element-wise basis, computes the cosine of the input in radians.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|---------------|---------|\n| Array.cos`()` | 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\nvar π = Math.PI;\nprint(ee.Array([-π]).cos()); // [-1]\nprint(ee.Array([-π / 2.0]).cos()); // [Almost zero]\nprint(ee.Array([0]).cos()); // [1]\nprint(ee.Array([π / 2.0]).cos()); // [Almost zero]\nprint(ee.Array([π]).cos()); // [-1]\n\nvar start = -π;\nvar end = π;\nvar points = ee.Array(ee.List.sequence(start, end, null, 50));\nvar values = points.cos();\n\n// Plot cos() 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: '-π'},\n {v: 0, f: 0},\n {v: end, f: 'π'}]\n },\n vAxis: {\n title: 'cos(x)',\n ticks: [\n {v: -1, f: -1},\n {v: 0, f: 0},\n {v: 1, f: 1}]\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\nπ = math.pi\ndisplay(ee.Array([-π]).cos()) # [-1]\ndisplay(ee.Array([-π / 2.0]).cos()) # [Almost zero]\ndisplay(ee.Array([0]).cos()) # [1]\ndisplay(ee.Array([π / 2.0]).cos()) # [Almost zero]\ndisplay(ee.Array([π]).cos()) # [-1]\n\nstart = -π\nend = π\npoints = ee.Array(ee.List.sequence(start, end, None, 50))\nvalues = points.cos()\n\ndf = pd.DataFrame({'x': points.getInfo(), 'cos(x)': values.getInfo()})\n\n# Plot cos() defined above.\nalt.Chart(df).mark_line().encode(\n x=alt.X('x', axis=alt.Axis(values=[start, 0, end])),\n y=alt.Y('cos(x)', axis=alt.Axis(values=[-1, 0, 1]))\n)\n```"]]