Lib.rs

math_repl是一个CLI REPL，允许用户快速计算表达式，将结果保存到变量中，并在另一个表达式或方程中使用这些变量。它还允许用户解方程，将结果保存到变量中，并在任何地方使用它们。所有步骤都会被记录，并可以导出为LaTeX（见下文使用说明）。

math_repl不仅支持数字，还支持向量和矩阵。

⚠️ math_repl基于math_utils_lib构建，它尚未达到1.0.0版本。预期会有破坏性更改和错误。

展示

安装

您可以从crates.io安装math_repl。

cargo install math_repl

请确保~/.cargo/bin在PATH中。

使用说明

以下是从内部帮助命令中获取的一些使用信息

You can do 4 basic operations:
        Calculate something: <expr>
        Save the results of a calculation to a variable: <varName> = <expr>
        Solve an equation or a system of equations: eq <expr> = <expr> (, <expr> = <expr>, ...)
        Solve an equation or a system of equations and save it into a variable: <varName> = eq <expr> = <expr> (, <expr> = <expr>, ...)
    As an <expr> counts:
        A scalar (number): <number>
        A vector: [<1>, <2>, ..., <n>]
        A matrix: [[<1:1>, <1:2>, ..., <1:n>], [<2:1>, <2:2>, ..., <2:n>], ..., [<n:1>, <n:2>, ..., <n:n>]] (column major order)
        A Variable: Any previously defined variable.

        You can also use all common operations (see https://docs.rs/math_utils_lib/latest/math_utils_lib/parser/enum.SimpleOpType.html)
        between all different types (It will tell you, when it can't calculate something).
        Additionally there are some advanced operations (see https://docs.rs/math_utils_lib/latest/math_utils_lib/parser/enum.AdvancedOpType.html).
    Additional commands:
        clear: Clears the screen, the history for LaTeX export and all vars except pi and e.
        clearvars: Clears all vars except pi and e.
        vars: Displays all vars.
        export (< --tex | --png >): Exports history since last clear in specified format (leave blank for .pdf).
        help: This help page.
        exit: Exits the REPL.
    Some rules:
        Variable Names must start with an alphabetical letter or a \\. (Greek symbols in LaTeX style get replaced before printing).
        Numbers in Variable Names are only allowed in LaTeX style subscript.
        Any other rules will be explained to you in a (not so) nice manner by the program.