Home / Get Math Help
How To Find the Amplitude of a Function
Usage
Arg[z] gives the argument of the complex number z.
Basic examples
The result is given in radians: In[1]:=Arg[-1] Out[1]=π In[2]:=Arg[1 + I] Out[2]=π/4 Plot over a subset of the reals: In[1]:=Plot[Arg[x], {x, -3, 3}] Out[1]= Plot over a subset of the complexes: In[1]:=ComplexPlot3D[Arg[z], {z, -2 - 2I, 2 + 2I}, PlotLegends->Automatic] Out[1]=
Attributes
Listable | NumericFunction | Protected
Relationships with other entities
ArcTan | Sign | Abs | AbsArg | Im | Re | Conjugate | ToPolarCoordinates
Typical ranks of usage in programs
135th most common (1 in 3170 symbols)
386th most common (1 in 15400 symbols)
517th most common (1 in 8050 symbols)
History
introduced in Version 1 (June 1988) last modified in Version 13 (December 2021)
Timeline