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Base 2 power and scale floating-point numbers
X = pow2(Y) X = pow2(F,E)
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.
This function corresponds to the ANSI C function ldexp() and the IEEE floating-point standard function scalbn().
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
log2 Base 2 logarithm and dissect floating-point numbers
into exponent and mantissa
^ Matrix power
.^ Array power
exp Exponential
hex2num Hexadecimal to double number conversion
realmax Largest positive floating-point number
realmin Smallest positive floating-point number