atan

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.

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Usage 1

atan(x)

x

a scalar, vector or matrix

Result

The inverse tangent of x.

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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)

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See also

tan, asin, acos, complex arithmetic (cr2p, cr2phi)

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