Functions and CALL Routines 
Returns the hyperbolic tangent.
CALL TANH(argument<, argument,...>);


argument

is numeric.
Restriction: 
The CALL TANH routine
only accepts variables as valid arguments. Do not use a constant or a SAS
expression, because the CALL routine is unable to update these arguments. 
The subroutine TANH replaces each argument
by the tanh of that argument. For example
is replaced by
If any argument contains a missing value, then CALL TANH returns missing
values for all the arguments.
The following SAS statements produce these
results:
SAS Statements 
Results 
x=0.5;
y=0.5;
call tanh(x,y);
put x= y=;

x=0.4621171573 y=0.462117157

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