Basic Data Types
Typing and binding of variables in PV-WAVE are dynamic, that is, the structure and type of data contained in a variable may change during a session. The basic data types that PV-WAVE variables may have are shown in Table 3-1: Basic Data Types.
Type | Definition |
|---|---|
BYTE | An 8-bit, unsigned integer ranging from 0 to 255. Pixels in images are commonly represented as byte data. |
INT | A 16-bit, signed integer ranging from –32,768 to +32,767. |
INT32 | A 32-bit, signed integer with the range –231 to 231 – 1. |
LONG | On 32-bit systems:  A 32-bit, signed integer ranging in value from –231 to 231 – 1.On 64-bit systems: A 64-bit, signed integer ranging in value from –263 to 263 – 1. |
FLOAT | A 32-bit floating point number in the range of ±1038 on machines supporting the IEEE standard, with approximately 6-7 decimal places of significance. |
DOUBLE | A 64-bit double precision, floating point number in the range of ±1038 on machines supporting the IEEE standard, with approximately 13–14 decimal places of significance. |
COMPLEX | A real-imaginary pair using single-precision floating point numbers. Complex numbers are useful for signal processing and frequency domain filtering. |
DCOMPLEX | A real-imaginary pair using double-precision floating point numbers. |
STRING | A sequence of alphanumeric characters, from 0 to 32,767 characters in length. |
UNDEFINED | An uninitialized variable. Attempts to reference the value of an undefined variable results in an error. |
