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acsch

computes the element-wise inverse hyperbolic cosecant of the argument.

Syntax

y = acsch(x)

Arguments

x

a real or complex array.

y

a real or complex array.

Description

Computes the element-wise inverse hyperbolic cosecant of the argument. For real argument with absolute value greater than 1 the result is real.

The following equalities hold: acsch(z) = -acsch(-z) = asinh(1/z) = csgn(%i+1/z)*asech(-i*z)-%i*%pi/2 = %i*acsc(%i*z)

Sample

Examples

x=linspace(1,20,200);
x=[-x($:-1:1) %nan x];
plot(x,acsch(x))

See also

References


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