NIBBLE

Purpose:

Extracts a 4 bit nibble from a value.

NIBBLE(val, num, bitpos)

val	-	A scalar, series or table.
num	-	Optional. An integer, the nibble to retrieve. Defaults to 1 (the first four bits).
bitpos	-	Optional. An integer. Bit position. bitpos: 1 then num refers to starting LSB BIT position, else num refers to 4 bit nibble boundary. Defaults to 0.

A series or number.

nibble(7+16)

Returns 7, the value of the first 4 bits.

nibble(7+16, 2)

Returns 1, the value of the second 4 bits.

nibble(7+16, 2, 1)

Returns 11, the value of the 4 bits starting at the 2nd bit, where the 2nd bit is the least significant bit - i.e. the value of bits 2 through 6.

Nibble also operates on series.