Application Guide

66 Alphabetical Listing
expand()
Catalog >
Even when there is only one variable, using
Var might make the denominator
factorization used for partial fraction
expansion more complete.
Hint: For rational expressions, propFrac() is
a faster but less extreme alternative to
expand().
Note: See also comDenom() for an
expanded numerator over an expanded
denominator.
expand(Expr1,[Var]) also distributes
logarithms and fractional powers
regardless of Var. For increased
distribution of logarithms and fractional
powers, inequality constraints might be
necessary to guarantee that some factors
are nonnegative.
expand(Expr1, [Var]) also distributes
absolute values, sign(), and exponentials,
regardless of Var.
Note: See also tExpand() for trigonometric
angle-sum and multiple-angle expansion.
expr()
Catalog >
expr(String) ⇒ expression
Returns the character string contained in
String as an expression and immediately
executes it.
ExpReg
Catalog >
ExpReg X, Y [, [Freq] [, Category,
Include]]
Computes the exponential regression y = a•
(b)
x
on lists X and Y with frequency Freq. A
summary of results is stored in the
stat.results variable. (See page 177.)