Function PGAMapIntegerToReal

Function Documentation

static double PGAMapIntegerToReal(PGAContext *ctx, unsigned int v, unsigned int nbits, double l, double u)

Map the value v defined on [0,(1<<nbits)-1] to double in [l,u].

Description

In the context of PGAPack \([a,b]\) is the discrete interval \([0,2^{nbits}-1]\) (i.e., the number of bits in a binary string) and \([l,u]\) represent the range of possible values of the real number \(r\).

Example

Map a five bit (that is, an integer with a range of [0, 31]) integer 7 to a real in the range [0, 3.14].

PGAContext *ctx;
double x;

...
x = PGAMapIntegerToReal (ctx, 7, 5, 0.0, 3.14);

Parameters:

  • ctx – context variable

  • v – value from original interval (usually the decoded bit string)

  • nbits – number of bits in integer

  • l – lower bound of double interval

  • u – upper bound of double interval

Returns:

Scaled double value of v defined on [l,u]