maddyguthridge / equator

A maths interpreter built in Python using SymPy

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equator's Issues

Fancy output display

Includes:

• Line numbers inside a margin
• Arrow keys to move cursor in Linux
• Auto colourisation of output to aid readability
• Pretty exception formatting (pointing to affected character?)

Expressions using a conversion between radians and degrees don't simplify correctly

Exp function

exp(x) returns e^x

Support for different base numbers

• Hexadecimal
• Octal
• Binary

Add support for equation generator functions

Eg lines, formulae, etc

Support for exponent notation

Eg 3.5e4 for 3.5 * 10^4

Add documentation to all functions

Leading negative after an equals sign won't parse correctly

Example: 1 = -x gives error.

String representations don't work in equations

Automatically display output in legible terms

Eg:

• sqrt(2) instead of 1.414...
• 2*pi instead of 6.283185...
• etc...

Support for integrals and differentials

Syntax like int( [expression], x) to integrate expression with respect to x and diff( [expression], x) to differentiate expression` with respect to x.

Test

Sympy/Sympy/#22142

Log functions

Including:

• log(x) for base-10 log
• ln(x) for natural log
• log_n(x) for base-n log, where n is an number

Better ways to format decimals as scientific or standard notation

The current way is slightly buggy and unreliable.

Example case: 52^8 is > 10^9 so it should be presented in scientific notation, but it isn't.

If possible, have separate functions for standard notation and scientific notation since they will be useful for output formatting later on.

Add support for output formatting

Use -> to split input from formatting options.

Includes:

• dec to put output as decimal
• +/- to include only/exclude the results of some variables

Refer to line numbers in input to include output of a previous statement

Eg x = [2] would simplify to x = [the output of whatever line 2's input was]

Support for commas to seperate function arguments

This will allow for differentials and integrals, as well as other useful things.

Errors in expression parsing

Find ways that the interpreter parses statements in a non-standard or confusing way, and fix them.

Inverse trig functions