Two-Variable Statistics - HP 39g+ User Manual

ROUND
SIGN
TRUNCATE
XPON

Two-variable statistics

11-16
Rounds value to decimal places. Accepts complex
numbers.
ROUND(value, places)
Round can also round to a number of significant digits as
showed in example 2.
Examples
ROUND(7.8676,2) returns 7.68
ROUND (0.0036757,-3) returns 0.00368
Sign of value. If positive, the result is 1. If negative, –1. If
zero, result is zero. For a complex number, this is the unit
vector in the direction of the number.
SIGN(value)
SIGN((x, y))
Examples
SIGN (–2) returns –1
SIGN((3,4)) returns (.6,.8)
Truncates value to decimal places. Accepts complex
numbers.
TRUNCATE(value, places)
Example
TRUNCATE(2.3678,2) returns 2.36
Exponent of value.
XPON(value)
Example
XPON(123.4) returns 2
These are functions for use with two-variable statistics.
See "Two-variable" on page 8-14.
Using mathematical functions