Programmer Guide/Command Reference/EVAL/atan: Difference between revisions
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Compute the inverse tangent of the argument. The function is applied element-wise and the result has always the same type as the argument ''x''. The values of the result are in the range '''-pi .. pi'''. | |||
---- | |||
;Usage 1: <code>atan(<var>x</var>)</code> | |||
:;<var>x</var>: a scalar, vector or matrix | |||
;Result: The inverse tangent of ''x''. | |||
---- | |||
;Usage 2: <code>atan(<var>y</var>, <var>x</var>)</code> | |||
:;<var>x</var>: a scalar, vector or matrix | |||
:;<var>y</var>: must have the same type as ''x'' | |||
;Result: The inverse tangent of <code>''y''/''x''</code>. E.g. this function can be used to compute the phase of a complex number: <code>''phi'':=atan(''im'',''re'')</code> | |||
---- | |||
;See also: [[../tan|tan]], [[../asin|asin]], [[../acos|acos]], [[../complex arithmetic|complex arithmetic (cr2p, cr2phi)]] | |||
[[../#Functions|<function list>]] | |||
Latest revision as of 11:14, 21 April 2011
Compute the inverse tangent of the argument. The function is applied element-wise and the result has always the same type as the argument x. The values of the result are in the range -pi .. pi.
- Usage 1
atan(x)- x
- a scalar, vector or matrix
- Result
- The inverse tangent of x.
- Usage 2
atan(y, x)- x
- a scalar, vector or matrix
- y
- must have the same type as x
- Result
- The inverse tangent of
y/x. E.g. this function can be used to compute the phase of a complex number:phi:=atan(im,re)
- See also
- tan, asin, acos, complex arithmetic (cr2p, cr2phi)
