Method tail

src/danfojs-base/core/frame.ts:547–561

* Returns the last n values in a DataFrame * @param rows The number of rows to return * @example * ``` * const df = new DataFrame([[1, 2], [3, 4]], { columns: ['A', 'B']}) * const df2 = df.tail(1) * ```

(rows: number = 5)

      * ```
    */
    tail(rows: number = 5): any {

        if (rows <= 0) {
            throw new Error("ParamError: Number of rows cannot be less than 1")
        }
        if (this.shape[0] <= rows) {
            return this.copy()
        }
        if (this.shape[0] - rows < 0) {
            throw new Error("ParamError: Number of rows cannot be greater than available rows in data")
        }

        rows = this.shape[0] - rows
        return this.iloc({ rows: [`${rows}:`] })
    }

    /**
     * Gets n number of random rows in a dataframe. Sample is reproducible if seed is provided.