---
name: "PGAGetRealFromBinary"
section: "1"
platform: "linux"
package: "pgapack"
version: "1.1.1-3"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/PGAGetRealFromBinary"
---

# PGAGetRealFromBinary(1)

Interpets a binary string as encoding a real value and returns the real value it represents.

## NAME

PGAGetRealFromBinary - Interpets a binary string as encoding a real value and returns the real value it represents.

## INPUT PARAMETERS

- ctx

  \- context variable

- p

  \- string index

- pop

  \- symbolic constant of the population the string is in

- start

  \- starting bit position in the binary representation

- end

  \- ending bit position in the binary representation

- lower

  \- lower bound of the interval the real number is defined on

- upper

  \- lower bound of the interval the real number is defined on

## OUTPUT PARAMETERS

- none

  ## SYNOPSIS

```
#include "pgapack.h"
double  PGAGetRealFromBinary(ctx, p, pop, start, end, lower, upper)
PGAContext *ctx
int p
int pop
int start
int end
double lower
double upper
```

## LOCATION

evaluate.c

## EXAMPLE

```
Example:
Decode a real value from the string p in population PGA_NEWPOP.  The
value to decode lies on the interval [-10,20] and is represented
using the 20 bits in bit positions 10--29.
double x;
:
x = PGAGetRealFromBinary(ctx, p, PGA_NEWPOP, 10, 29, -10.0, 20.0);
```