Base 2 power and scale floating-point numbers
X = pow2(Y)
X = pow2(F,E)
X = pow2(F,E) computes x = f * 2e 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.
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