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tanh(x), x REAL or a structure with REAL components

Keywords: transformations
tanh(x) returns the hyperbolic sine of the elements of x, when x is a
REAL scalar, vector, matrix or array.  The result has the same shape as
x.  In terms of other functions, tanh(x) = (exp(x)-exp(-x))/

When any element of x is MISSING the corresponding element of tanh(x) is
MISSING and a warning message is printed.

When x is a structure, all of whose non-structure components are REAL,
tanh(x) is a structure of the same shape and with the same component
names as x, with each non-structure component transformed by tanh().

See topic 'transformations' for more information on tanh().

Gary Oehlert 2003-01-15