John Keith

First Name:John
Last Name:Keith
Last Change:2018-12-21
Number of Files:6 (258th most prolific)
Number of Downloads:151 (2,364th most downloaded)

Fast Pascal's Triangle   (details) 49/50 ENG   4KB/1KB
Quickly generates any row of Pascal's Triangle. Also includes a program to calculate rows of the Narayana triangle, too. Requires ListExt.
By John Keith. 2018/09/09

Normal Distribution Functions   (details) 49/50 ENG   3KB/1KB
Simple programs for working with normal distributions, for calculating the lower-tail normal CDF, the normal PDF Z(x), normally distributed random numbers, and an array of normally distributed complex numbers.
By John Keith. 2018/12/21

Partition Numbers   (details) 49/50 ENG   3KB/1KB
Given an integer n on the stack, these two programs return a list of the partition numbers (A000041) from 0 through n. The first program is small, and the second one is fast.
By John Keith. 2018/09/25

Ramanujan Tau Function   (details) 49/50 ENG   4KB/1KB
Set of three User RPL programs to compute the Ramanujan tau function (A000594) for positive integers. Requires Sum of Divisors to an Integer Power and ListExt. Also includes a standalone program written in System RPL.
By John Keith and Gerald Hillier. 2018/12/21

Shoelace Algorithm   (details) 49/50 ENG   4KB/1KB
A program that uses the shoelace method for calculating the area of a polygon and another version that also calculates the area and centroid (barycenter) of a polygon.
By John Keith and Thomas Klemm. 2018/09/09

Zigzag Numbers   (details) 49/50 ENG   2KB/1KB
Set of two programs for zigzag numbers. One returns a list of the zigzag numbers (A000111) from 0 though n. The even-indexed terms (starting with 0) of the list are the unsigned Euler numbers, also known as secant numbers (AA000364). The odd-indexed terms (starting with 1) are the tangent numbers, AA000182. The other returns rows 0 through n of AA008281, the triangle from which the zigzag numbers are derived. Requires GoferLists.
By John Keith. 2018/10/14

Part of the HP Calculator Archive,
Copyright 1997-2019 Eric Rechlin.