Struct GradientOperations 

pub struct GradientOperations;

Gradient vector operations

Implementations

impl GradientOperations

pub fn compute(expr: &Expression, variables: Vec<Symbol>) -> Vec<Expression>

Compute gradient vector

Examples

use mathhook_core::simplify::Simplify;
use mathhook_core::calculus::derivatives::Derivative;
use mathhook_core::{Expression};
use mathhook_core::symbol;
use mathhook_core::calculus::derivatives::GradientOperations;

let x = symbol!(x);
let y = symbol!(y);
let expr = Expression::add(vec![
    Expression::pow(Expression::symbol(x.clone()), Expression::integer(2)),
    Expression::pow(Expression::symbol(y.clone()), Expression::integer(2))
]);
let gradient = GradientOperations::compute(&expr, vec![x, y]);

pub fn compute_cached( expr: &Expression, variables: &[Symbol], cache: &mut HashMap<Symbol, Expression>, ) -> Vec<Expression>

Compute gradient with caching for repeated computations

Examples

use mathhook_core::{Expression};
use mathhook_core::symbol;
use mathhook_core::calculus::derivatives::GradientOperations;
use std::collections::HashMap;

let x = symbol!(x);
let y = symbol!(y);
let expr = Expression::mul(vec![
    Expression::symbol(x.clone()),
    Expression::symbol(y.clone())
]);
let mut cache = HashMap::new();
let gradient = GradientOperations::compute_cached(&expr, &[x, y], &mut cache);