mg_acosh.pro (mglib)
Inverse hyperbolic cosine. Uses the formula:
$$\text{acosh}(z) = \ln(z + \sqrt{z + 1} \sqrt{z - 1})$$
Syntax
result = mg_acosh(z)
Return value
float, double, complex, or double complex depending on the input
Parameters
- z in required type=numeric
input
Examples
The arc hyperbolic sine function looks like:
IDL> x = 2.5 * findgen(1000) / 999. + 1.
IDL> plot, x, mg_acosh(x), xstyle=1
This should look like:
