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ee.Array.atan

  • TheArray.atan() method computes the arctangent in radians for each element of an input array.

  • This method takes an Array as input and returns an Array as output.

  • Examples are provided in both JavaScript and Python demonstrating the usage and plotting of theatan() function.

 On an element-wise basis, computes the arctangent in radians of the input.

UsageReturns
Array.atan()Array
ArgumentTypeDetails
this:inputArrayThe input array.

Examples

Code Editor (JavaScript)

print(ee.Array([-5]).atan());// [-1.3734]print(ee.Array([0]).atan());// [0]print(ee.Array([5]).atan());// [1.3734]varstart=-5;varend=5;varpoints=ee.Array(ee.List.sequence(start,end,null,50));varvalues=points.atan();// Plot atan() defined above.varchart=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:'atan(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 setup

See the Python Environment page for information on the Python API and usinggeemap for interactive development.

importeeimportgeemap.coreasgeemap

Colab (Python)

importmathimportaltairasaltimportpandasaspddisplay(ee.Array([-5]).atan())# [-1.3734]display(ee.Array([0]).atan())# [0]display(ee.Array([5]).atan())# [1.3734]start=-5end=5points=ee.Array(ee.List.sequence(start,end,None,50))values=points.atan()df=pd.DataFrame({'x':points.getInfo(),'atan(x)':values.getInfo()})# Plot atan() defined above.alt.Chart(df).mark_line().encode(x=alt.X('x',axis=alt.Axis(values=[start,0,end])),y=alt.Y('atan(x)',axis=alt.Axis(values=[-math.pi/2,0,math.pi/2])))

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Last updated 2024-09-19 UTC.