PCalc

1. 4.2 Wow
2. 4 Minus Negative 2

Our first program (1993) replacing tables of probability distributions, was running on the command line under MS-DOS. It was written in Pascal by Sytse Knypstra and Arjen Merckens. In fact it was a combination of a calculator and a replacement of probability tables.

Decreasing: x ∈ (− 4, − 2) ∪ (1.5, ∞) Notice that open intervals are used because at x = − 4, − 2, 1.5 the slope of the function is zero. This is where the slope transitions from being positive to negative. PCalc 4.7 Crack is a full-featured, scriptable scientific calculator for Mac & Windows. It support for hexadecimal, octal, and binary calculations. Moreover, PCalc Crack has an RPN mode, programmable functions, and an extensive set of unit conversions. Therefore download this.

An update to PCalc 4.0.2 is live on the Mac App Store now. This is another fairly small bug fix release, but it also adds a number of cool new features, including: Much improved user functions and conversions. Support for hex, octal, and binary specifc user functions and constants.

Installation

Download the compressed file PCalc.zip (50 kB), unzip it and start PCalc.exe under the program DOSBox.

PQRS 2

Around the year 2000 PQRS (Probabilities, Quantiles and Random Samples) was designed as a successor to PCalc with a graphical user interface. PQRS was written in Delphi and runs under Windows and - with the help of Wine - under Linux.

Installation

4.2 Wow

Download the compressed file PQRS.zip (0.7 MB), unzip it and start PQRS.exe.

PyQRS 3

4 Minus Negative 2

In 2013 PQRS was rewritten in Python. In order to distinguish it from the previous PQRS version, and as a tribute to Python and its author, Guido van Rossem, the first letter in its name was replaced by 'Py'.

PyQRS 4.0

PyQRS 4.0 (March 2016) is functionally equivalent to its predecessor PyQRS 3. It runs on Android (mobile) devices. The app is written in Python using the Kivy framework. For PyQRS 4.0 we could not use Scipy as we did for PyQRS 3. The probability (density) functions and the cumulative distribution functions were therefore programmed in Python. The code could easily be adapted from the Delphi code that we used earlier for PQRS 2.

PyQRS 4.1

PyQRS 4.1 (June 2017) has an improved user interface over its predecessor PyQRS 4.0. It runs on Android (mobile) devices, and on the Linux (64 bits) and Windows (64 bits) platforms.
Screenshots can be found under Using PyQRS.