DOLLAR_DECIMAL Function

Converts a fractional price to a decimal price.

Usage

result = DOLLAR_DECIMAL (fractional_num, fraction)

Input Parameters

fractional_num—Whole number of dollars plus the numerator, as the fractional part.

fraction—Denominator of the fractional dollar. fraction must be positive.

Returned Value

result—The dollar price expressed as a decimal number. The dollar price is the whole number part of fractional-dollar plus its decimal part divided by fraction. If no result can be computed, NaN is returned.

Input Keywords

Double—If present and nonzero, double precision is used.

Discussion

Function DOLLAR_DECIMAL converts a dollar price, expressed as a fraction, into a dollar price, expressed as a decimal number.

It is computed using the following:

 

where idollar is the integer part of fractional_num, and ifrac is the integer part of log(fraction).

Example

In this example, DOLLAR_DECIMAL converts $1 1/4 to $1.25.

PRINT, DOLLAR_DECIMAL(1.1, 4)

; PV-WAVE prints: 1.25000