Converts a decimal price to a fractional price.

decimal_dollar—Dollar price expressed as a decimal number.

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

result—Dollar price expressed as a fraction. The numerator is the decimal part of the returned value. If no result can be computed, NaN is returned.

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

Function DOLLAR_FRACTION converts a dollar price, expressed as a decimal number, into a dollar price, expressed as a fractional price. If no result can be computed, NaN is returned.

It can be found by solving the following:

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

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

PRINT, DOLLAR_FRACTION(1.25, 4)

; PV-WAVE prints: 1.10000