Stephen Lewkowicz

First Name:Stephen
Last Name:Lewkowicz
Last Change:2019-12-29
Number of Files:24 (45th most prolific)
Number of Downloads:15,473 (728th most downloaded)

Benchmarks   (details) Prime ENG   12KB/23KB
A simple harness for running benchmarks, along with an implementation of the Savage benchmark, in PPL and CAS, and an implementation of the original Whetstone benchmark algorithm in PPL.
By Stephen Lewkowicz (G1CMZ). 2017/12/06

Bézier Curves   (details) Prime ENG   6KB/11KB
ScreenshotA program for generating and drawing Bézier curves
By Stephen Lewkowicz (G1CMZ). 2018/01/24

BLAS 0.1   (details) Prime ENG   13KB/35KB
Basic Linear Algebra Subprograms, which implements most of the BLAS Level 1 functions in single precision.
By Stephen Lewkowicz (G1CMZ). 2019/09/11

CSV 0.1   (details) Prime ENG   8KB/16KB
Loads and parses CSV files and strings.
By Stephen Lewkowicz (G1CMZ). 2017/02/11

Earthquake Calculations 1.2   (details) Prime ENG FRA   11KB/26KB
ScreenshotCalculates M0, Magnitude and energy of a quake, and compares quakes. All of the formulae here can be applied to earthquakes, many can also be applied to other planets.
By Stephen Lewkowicz (G1CMZ). 2019/07/20

Fingerspelling 0.3   (details) Prime ENG   13KB/25KB
Implements an accessibilty resource for the deaf and visually impaired, using AFiles. Fingerspelling graphics must be provided by the user (One per character).
By Stephen Lewkowicz (G1CMZ). 2016/08/06

Fortran IO 0.001   (details) Prime ENG   7KB/14KB
Some routines that might help parse Fortran-formatted data. A work in progress that acts as a reminder of what popular formatting codes mean. Parsing these comprehensively will never be completed, but some of the simpler formats are handled.
By Stephen Lewkowicz (G1CMZ). 2017/02/11

Geodesy API 0.33   (details) Prime ENG   19KB/47KB
ScreenshotA collection of useful geodesy routines. Not for navigational use (estimated 14% error).
By Stephen Lewkowicz (G1CMZ). 2017/02/11

Horizons: Distance to Horizon 0.3   (details) Prime ENG   10KB/14KB
ScreenshotImplements simple geometric solutions for spheres, taking no account of refraction. It includes functions for distance to horizon at a given height, and inverse functions.
By Stephen Lewkowicz (G1CMZ). 2019/04/22

List API 1.5   (details) Prime ENG   20KB/53KB
A few list handling routines. The aim was to provide many of the list primitives listed on Wikipedia, so as to enable common names to be used across platforms.
By Stephen Lewkowicz (G1CMZ). 2018/10/13

Lunar Astronomy 1.0   (details) Prime ENG   6KB/14KB
ScreenshotIllustrates the Moon, the Earth, the Moon's orbit around the Earth, and animates the light-distance of the Moon from the Earth.
By Stephen Lewkowicz (G1CMZ). 2019/07/20

Means API   (details) Prime ENG   9KB/22KB
A collection of common means and other numerical list routines.
By Stephen Lewkowicz (G1CMZ). 2018/01/07

Observatories 0.001   (details) Prime ENG   6KB/12KB
Attempts to parse the observatories file from the Minor Planets Centre and map their locations.
By Stephen Lewkowicz (G1CMZ). 2017/02/11

PPLX 0.1   (details) Prime ENG   6KB/14KB
Creates some extras that might have been included in PPL, providing implementation limits and TYPEs.
By Stephen Lewkowicz (G1CMZ). 2019/09/11

Repeating Decimals / Recurring Decimals 0.9   (details) Prime ENG   13KB/29KB
Given an integer reciprocal, analyzes the decimal representation to identify the transient and repeating/recurring parts of the decimal.
By Stephen Lewkowicz (G1CMZ). 2018/02/18

SortLists 0.7   (details) Prime ENG   12KB/30KB
A collection of Sort functions for lists. Requires List API.
By Stephen Lewkowicz (G1CMZ). 2019/12/29

Tower of Hanoi   (details) Prime ENG FRA   7KB/12KB
ScreenshotTower of Hanoi game that allows you to enter a challenge time, and calculates the average time per move or enter an average move time and calculate how long a practical activity with real objects will need. It implements the minimum 3-towers solution to the problem. It lists the required moves in lists L1 (from) and L2 (to). There is no animation of the contents of each tower.
By Stephen Lewkowicz (G1CMZ). 2016/08/06

Z Astronomical Routines   (details) Prime ENG   5KB/6KB
A few astronomical routines, to estimate a planet's temperature, calculate drag on a spacecraft, and calculate magnitudes.
By Stephen Lewkowicz (G1CMZ). 2017/02/11

Z Editor 0.3   (details) Prime ENG   7KB/6KB
An early attempt at an improved text editor that adds search functionality.
By Stephen Lewkowicz (G1CMZ). 2015/09/18

Z LIGHTS 0.4   (details) Prime ENG   7KB/16KB
Prime's answer to mobile phone flashlights. Given that the HP Prime has no external accessible lights, this program may be of little practical use, unless the lights go out while you are using your calculator. The design aim is a compromise between maximizing the limited illumination available, and including some information that a flashlight would not (the time the light was activated).
By Stephen Lewkowicz (G1CMZ). 2017/11/12

Z Periodic 2.1   (details) Prime ENG FRA   7KB/26KB
ScreenshotDisplays a simple periodic table of elements.
By Stephen Lewkowicz (G1CMZ). 2016/08/04

Z Std Maths 0.001   (details) Prime ENG   6KB/10KB
Some standard mathematics routines, including base conversion, precision, and more.
By Stephen Lewkowicz (G1CMZ). 2017/02/11

Z UNITS 0.1   (details) Prime ENG   14KB/33KB
Allows the user to convert many (but not all) HP units, with support for SI prefixes. It also defines some Planck units and converts data units.
By Stephen Lewkowicz (G1CMZ). 2016/08/03

ZIPP 0.6   (details) Prime ENG FRA   6KB/15KB
G1CMZ's Immensely Practical Package, containing programs to do things like calculate the distance of a thunderstorm. Uses Z LIGHTS and Z UNITS.
By Stephen Lewkowicz (G1CMZ). 2016/08/03

Part of the HP Calculator Archive,
Copyright 1997-2023 Eric Rechlin.