TI-BASIC:Routines

When contributing routines, please follow these guidelines: A routine should be self-contained, and relatively short in length. Exclude the input and output, unless the routine is specifically meant to do that. A routine should be thoroughly tested to make sure it works correctly. Use the Routine Template as the starting point for routine pages. When the routine page is finished, link to it from here.

Conversion

• Number_To_String (alternative) -- Converts a real number to a string.
• Matrix_To_String -- Converts a matrix of encoded letters to a string.
• List_To_String (alternative) -- Converts a list of encoded letters to a string.
• String_To_List (alternative) -- Converts a string to a list of encoded letters.
• Decimal_To_Fraction (alternative) -- Converts a decimal number to a fraction.
• Numerically_Index_Words -- Retrieves a word from an indexed string of words with an index number.

Number

• Number_One_Liners -- One or two line routines too short for their own page.
• Number_Subset -- Returns a subset of a number.
• Number_Or_String -- Detect Whether Ans is a String or a Number.
• Number_Or_List -- Detect Whether Ans is a List or a Number.

List & Matrix

• List_&_Matrix_One_Liners -- One or two line routines too short for their own page.
• Sum of Matrix Elements -- Sums the elements of a matrix.
• List Frequency -- Finds the frequency of values in a list.
• RLE Compression -- Compresses a list of numbers.
• RLE Decompression -- Reverses the above routine.
• Binary_Data_Compression -- Bitwise compression of binary data.
• Isolating Element Index Number -- Finds the index number of an element number in a list.

String

• String_One_Liners -- One or two line routines too short for their own page.
• Reverse_A_String -- Reverses a string.
• Strip_A_String -- Strips a string of its outside spaces.
• Scramble_A_String -- Scrambles a string.
• Change_Case_Of_A_String -- Changes a string to lowercase or uppercase.

Text

• Highlighting_Text -- Invert text to white on a black background.
• Wordwrapping Text -- Split text between several lines on the graph screen.
• Marquee -- Scroll a one-line string, like a marquee.
• Blinking_Text -- Creates a blinking effect on the home screen.
• Typewriter -- Makes text appear letter by letter.

Graphics

• Shading_Circles -- Draws a shaded circle.
• Draw_Ellipse -- Draws an ellipse at the selected coordinates.
• Custom_Menu_Single_Page -- Draws and navigate through a menu and returns the number of option.
• Custom_Menu_Multi_Page -- Draws and navigate through a menu and returns the number of option.

Math

• Math_One_Liners -- One or two line routines too short for their own page.
• Goodness-of-Fit Test -- Performs a chi-square goodness-of-fit test.
• Linear Regression Standard Error -- Computes the standard error of linear regression coefficients.
• Quadratic_Formula -- Finds the roots of a quadratic equation.
• Cubic_Formula -- Finds the roots of a cubic equation.
• Simplify_Radicals -- Simplifies a square root radical.
• Pythagorean_Triples -- Displays the Pythagorean theorem triples.
• Number Factorization -- Finds the factors of a number.
• Polynomial_Division -- Divides polynomials of any degree.
• Sierpinski_Triangle -- Displays the Sierpinski triangle fractal.
• Pascal's Triangle -- Gets a row of Pascal's triangle.
• Modular_Arithmetic_Solver -- Solves modular arithmetic problems, also usable for finding a remainder.
• Day_Of_Week (Alternative) -- Substitute for the DayOfWk( command for pre-84+ calculators.
• Day, Date & Time -- displays Day, Month, Year, Day of week and Time with no user input.
• Easter_Calculation -- Calculates the Easter Sunday of any given year.
• Synthetic_Division -- Calculates a0xn + a1xn-1 +a2xn-2 + … + an-1x + an/(x-r) , (where a0 ≠ 0)

Keyboard

• Key_Code_Retriever -- Displays the key code for any key that you press.
• Key_Code_To_Letter -- Outputs the letter corresponding to the key press.
• Number_Pad_Reader -- Output the number pressed (0-9) or any other key.