Sunday, September 24, 2023

HP 15C: Error Function and Lower Tail Normal Cumulative Function

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 HP 15C:   Error Function and Lower Tail Normal Cumulative Function Formulas Used  Error Function  erf(x) = 2 ÷ √π * ∫( e^(-t^2) dt, t = 0 t...
Saturday, September 23, 2023

HP 15C: Quadratic Solver Using Solve and Flags

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HP 15C:  Quadratic Solver Using Solve and Flags Introduction This program solves the quadratic equation for real roots: a x^2 + b x + c = 0 ...
Sunday, September 17, 2023

Filling the Memory of a Casio fx-4000P

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Filling the Memory of a Casio fx-4000P How many programs does it take to fill the 550 step memory?   Here are six programs that pretty much ...
Saturday, September 16, 2023

Integrating Absolute Value Functions

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Integrating Absolute Value Functions Calculating ∫ abs(f(x)) dx The function abs(f(x)) can be broken into two parts, depending on the sign o...
Sunday, September 10, 2023

TI-84 Plus CE Python and TI-83 Premium CE Python Edition: Blinking Binary Strings

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TI-84 Plus CE Python and TI-83 Premium CE Python Edition:  Blinking Binary Strings Introduction The script BINBLANK.py draws a circle's ...
Saturday, September 9, 2023

Casio fx-9750GIII: Coin Flips and Probability of Winning

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Casio fx-9750GIII:  Coin Flips and Probability of Winning Introduction The program COINPROB answers two questions in probability: Take a gam...
Sunday, September 3, 2023

Python: Basic Functions with Quaternions

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 Python:   Basic Functions with Quaternions    Calculating with Quaternions Quaternions are four-dimensional hypercomplex numbers that is wr...
Saturday, September 2, 2023

TI-84 Plus CE Python: Drawing Random Paths

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TI-84 Plus CE Python: Drawing Random Paths Introduction The Python script PATHS draws a path from the left side to one of the other three si...