pow2 - Base 2 power and scale floating-point numbers
Syntax
X = pow2(Y)
X = pow2(F,E)
Description
X = pow2(Y) returns an array X whose
elements are 2 raised to the power Y.
X = pow2(F,E) computes
for corresponding elements
of F and E. The result is computed quickly
by simply adding E to the floating-point exponent of F.
Arguments F and E are real and integer
arrays, respectively.
Remarks
This function corresponds to the ANSI C function ldexp() and
the IEEE floating-point standard function scalbn().
Examples
For IEEE arithmetic, the statement X = pow2(F,E) yields
the values:
F E X
1/2 1 1
pi/4 2 pi
-3/4 2 -3
1/2 -51 eps
1-eps/2 1024 realmax
1/2 -1021 realmin See Also
log2, exp, hex2num, realmax, realmin
The arithmetic operators ^ and .^
 | polyvalm | | power |  |
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