PI(FofN,from,thru)

Evaluates the product of a series.

Syntax

o_PI(FofN,from,thru)

FofN:  scalar Text - function to be evaluated with argument "n". Optionally an array input can be used for a more complex series. See Notes below.

from: scalar number - lower limit of "n"

thru: scalar number - upper limit of "n"

return: numeric - the product of terms F(n) for n=from through n=thru

Usage

An arbitrary function of "n" can be evaluated for a series. This implements a standard "PI" notation product.

Location

menu: veeos ==> Math ==> PI

library: mathLib

Example

o_PI("n^2*(n-1)",3,5) = (9*2)*(16*3)*(25*4) = 86400

Notes

A very common operation for series is the product of the various terms. This evaluates that product.

New for R2: instead of being limited to a single range of input values, a more complex series such as a Kalman filter may be evaluated by specifying a function and a series of values in the form of a record.

Reference

Dependencies

Supported On

VEE 7.0+, all platforms

See Also

SIGMA