settlement,maturity,frequency,basis!Returns the number of days from the beginning of the coupon period to the settlement ...

!settlement,maturity,frequency,basis!!Returns the number of days from the beginning of the coupon period to the settlement date!is the security's settlement date, expressed as a serial date number!is the security's maturity date, expressed as a serial date number!is the number of coupon payments per year!is the type of day count basis to use!