export type FitType = 'linear' | 'polynomial' | 'exponential' | 'logarithmic' | 'power';
export interface FitOptions {
    /** Degree for polynomial fit (default: 2) */
    degree?: number;
    /** Custom label for the equation */
    label?: string;
    /** Number of decimals in equation string */
    precision?: number;
}
export interface FitResult {
    type: FitType;
    /** Coefficients (a, b, c...) */
    coefficients: number[];
    /** Formatted equation string */
    equation: string;
    /** Coefficient of determination */
    rSquared: number;
    /** Function to calculate value at X */
    predict: (x: number) => number;
}
/**
 * Perform regression on a dataset
 */
export declare function fitData(x: number[] | Float32Array, y: number[] | Float32Array, type: FitType, options?: FitOptions): FitResult;