Struct Equation

pub struct Equation {
    pub text: String,
    pub expression: Component,
}

The equation struct containing the equation text and the parsed component.Component.

Various functions can be executed on this equation to solve it or it’s variables.

Fields

text: String

The equation in string form

expression: Component

The equation in a component tree

Implementations

impl Equation

pub fn new<T: Into<String>>(text: T) -> Equation

Creates a new equation from an equation in string form

Examples

let eq = calculi::Equation::new("a * sqrt(x + 1)");

pub fn derive(&self) -> Equation

Get the derivative of an equation

Examples

let eq = calculi::Equation::new("x^sin(x)").derive();

assert_eq!(eq.text, "x ^ sin(x) * (cos(x) * ln(x) + sin(x) * 1 / x)");

pub fn solve_with<'a>( &self, vars_raw: impl IntoIterator<Item = (&'a str, f32)>, ) -> Component

Get the output of an equation with the given variable definitions

Examples

let eq = calculi::Equation::new("a * sqrt(x + 1)");

assert_eq!(eq.solve_with(vec![("a", 2.0), ("x", 8.0)]).to_float().unwrap(), 6.0);

pub fn solve_for<'a>( &self, outcome: f32, vars: impl IntoIterator<Item = (&'a str, f32)>, ) -> (Component, f32)

Attempt to solve equation that contains an unknown variable Returns left over outcome and expression if solving failed

Examples

let eq = calculi::Equation::new("a * sqrt(x + 1)");

let solved = eq.solve_for(9.0, vec![("x", 8.0)]);

assert_eq!(solved.0.to_string(), "a");
assert_eq!(solved.1, 3.0);

Trait Implementations

impl Debug for Equation

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<Component> for Equation

fn from(expression: Component) -> Self

Converts to this type from the input type.