Method at

src/danfojs-base/core/frame.ts:3404–3409

* Access a single value for a row/column label pair. * Similar to loc, in that both provide label-based lookups. * Use at if you only need to get or set a single value in a DataFrame. * @param row Row index of the value to access. * @param column Column label of the valu

(row: string | number, column: string)

     * ```
    */
    at(row: string | number, column: string): string | number | boolean | undefined {
        if (typeof column !== 'string') {
            throw new Error('ParamError: column index must be a string. Use .iat to get a row or column by index.')
        }
        return (this.values as ArrayType2D)[this.index.indexOf(row)][this.columns.indexOf(column)]
    }

    /**
     * Exposes functions for creating charts from a DataFrame.