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ee.Array.tanh
透過集合功能整理內容
你可以依據偏好儲存及分類內容。
以元素為單位，計算輸入的雙曲正切。
範例
程式碼編輯器 (JavaScript)
print(ee.Array([-5]).tanh()); // [~ -1]
print(ee.Array([0]).tanh()); // [0]
print(ee.Array([5]).tanh()); // [~ 1]
var start = -5;
var end = 5;
var points = ee.Array(ee.List.sequence(start, end, null, 50));
var values = points.tanh();
// Plot tanh() 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},
{v: 0},
{v: end}]
},
lineWidth: 1,
pointSize: 0,
});
print(chart);
Python 設定
請參閱
Python 環境頁面，瞭解 Python API 和如何使用 geemap 進行互動式開發。
import ee
import geemap.core as geemap
Colab (Python)
import altair as alt
import pandas as pd
display(ee.Array([-5]).tanh()) # [~ -1]
display(ee.Array([0]).tanh()) # [0]
display(ee.Array([5]).tanh()) # [~ 1]
start = -5
end = 5
points = ee.Array(ee.List.sequence(start, end, None, 50))
values = points.tanh()
df = pd.DataFrame({'x': points.getInfo(), 'tanh(x)': values.getInfo()})
# Plot tanh() defined above.
alt.Chart(df).mark_line().encode(
x=alt.X('x'),
y=alt.Y('tanh(x)', axis=alt.Axis(values=[start, 0, end]))
)
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上次更新時間：2025-07-26 (世界標準時間)。
[null,null,["上次更新時間：2025-07-26 (世界標準時間)。"],[[["\u003cp\u003eCalculates the hyperbolic tangent of each element in an input array.\u003c/p\u003e\n"],["\u003cp\u003eReturns a new array with the calculated hyperbolic tangent values.\u003c/p\u003e\n"],["\u003cp\u003eAccepts a single argument: the input array.\u003c/p\u003e\n"],["\u003cp\u003eUsable in both JavaScript and Python environments within Google Earth Engine.\u003c/p\u003e\n"]]],["The core function is `Array.tanh()`, which calculates the hyperbolic tangent of each element in an input array. It accepts an array as input and returns a new array containing the element-wise hyperbolic tangent values. Example usages are demonstrated with inputs of -5, 0, and 5, showing outputs of approximately -1, 0, and 1, respectively. The code provides a visual plot of the function, illustrating the input values and the associated output from -5 to 5.\n"],null,["# ee.Array.tanh\n\nOn an element-wise basis, computes the hyperbolic tangent of the input.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|----------------|---------|\n| Array.tanh`()` | 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([-5]).tanh()); // [~ -1]\nprint(ee.Array([0]).tanh()); // [0]\nprint(ee.Array([5]).tanh()); // [~ 1]\n\nvar start = -5;\nvar end = 5;\nvar points = ee.Array(ee.List.sequence(start, end, null, 50));\nvar values = points.tanh();\n\n// Plot tanh() 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},\n {v: 0},\n {v: end}]\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 altair as alt\nimport pandas as pd\n\ndisplay(ee.Array([-5]).tanh()) # [~ -1]\ndisplay(ee.Array([0]).tanh()) # [0]\ndisplay(ee.Array([5]).tanh()) # [~ 1]\n\nstart = -5\nend = 5\npoints = ee.Array(ee.List.sequence(start, end, None, 50))\nvalues = points.tanh()\n\ndf = pd.DataFrame({'x': points.getInfo(), 'tanh(x)': values.getInfo()})\n\n# Plot tanh() defined above.\nalt.Chart(df).mark_line().encode(\n x=alt.X('x'),\n y=alt.Y('tanh(x)', axis=alt.Axis(values=[start, 0, end]))\n)\n```"]]
