Function extract_coefficient_map 

pub fn extract_coefficient_map(
    expr: &Expression,
    var: &Symbol,
) -> HashMap<i64, Expression>

Extract all coefficients of a polynomial as a map from degree to coefficient

Returns a HashMap where keys are degrees and values are coefficients.

Arguments

• expr - The polynomial expression
• var - The variable to extract coefficients for

Returns

A HashMap mapping degree (i64) to coefficient (Expression)

Examples

use mathhook_core::core::polynomial::extract_coefficient_map;
use mathhook_core::{expr, symbol};

let x = symbol!(x);
let poly = expr!((3 * (x ^ 2)) + (2 * x) + 1);

let coeffs = extract_coefficient_map(&poly, &x);
// coeffs[0] = 1, coeffs[1] = 2, coeffs[2] = 3