/**
 * Numerically encodes the strings in the matrix and returns an encoding dictionary which can be used to encode other matrices
 * @param matrixInitial - original matrix before encoding
 * @returns - dictionary from string to number
 */
export declare function matrixNumericalEncoding(matrixInitial: Array<Array<string | number>>): {
    matrix: number[][];
    dictCategoricalToNumerical: Record<string, number>;
};
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