Programmer Guide/Command Reference/EVAL/atan: Difference between revisions
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:;<var>x</var>: a scalar, vector or matrix | :;<var>x</var>: a scalar, vector or matrix | ||
:;<var>y</var>: must have the same type as ''x'' | :;<var>y</var>: must have the same type as ''x'' | ||
;Result: The inverse tangent of ''y / x''. | ;Result: The inverse tangent of ''y / x''. E.g. this function can be used to compute the phase of a complex number: <code>''phi'' := atan(''im'', ''re'')</code> | ||
---- | ---- | ||
;See also: [[Programmer_Guide/Command_Reference/EVAL/asin|asin]], [[Programmer_Guide/Command_Reference/EVAL/cos|cos]], [[Programmer_Guide/Command_Reference/EVAL/tan|tan]], [[Programmer_Guide/Command_Reference/EVAL/cr2p|cr2p]], [[Programmer_Guide/Command_Reference/EVAL/cr2phi|cr2phi]] | ;See also: [[Programmer_Guide/Command_Reference/EVAL/asin|asin]], [[Programmer_Guide/Command_Reference/EVAL/cos|cos]], [[Programmer_Guide/Command_Reference/EVAL/tan|tan]], [[Programmer_Guide/Command_Reference/EVAL/cr2p|cr2p]], [[Programmer_Guide/Command_Reference/EVAL/cr2phi|cr2phi]] | ||
[[Programmer_Guide/Command_Reference/EVAL#Functions|<function list>]] | [[Programmer_Guide/Command_Reference/EVAL#Functions|<function list>]] | ||
Revision as of 12:31, 4 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)
