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ATANH

ATANH

Name


    ATANH

Purpose


    Numerically calculate the inverse of the TANH function for real
    values.

Category


    Math:

Calling Sequence


    Result = ATANH(X)

Inputs


    X: Argument to atanh. May be an array.

Outputs


    The arctanh of the argument. Note that because of the numerical inversion
    method, the results will be inaccurate for input values very near 1.

Example


    IDL> PRINT, ATANH(TANH([0,1,2]))
          0.00000 1.00000 2.00000

Modification History


    Written by: Jeremy Bailin
    27 Nov 2008 Released in JBIU



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