Method mode

src/danfojs-base/core/frame.ts:895–921

* Return mode of DataFrame across specified axis. * @param options.axis 0 or 1. If 0, compute the mode column-wise, if 1, row-wise. Defaults to 1 * @param options.keep If there are more than one modes, returns the mode at position [keep]. Defaults to 0 * @example * ``` * con

(options?: { axis?: 0 | 1, keep?: number })

     * ```
    */
    mode(options?: { axis?: 0 | 1, keep?: number }): Series {
        const { axis, keep } = { axis: 1, keep: 0, ...options }

        if (this.$frameIsNotCompactibleForArithmeticOperation()) {
            throw Error("TypeError: mode operation is not supported for string dtypes");
        }

        if ([0, 1].indexOf(axis) === -1) {
            throw Error("ParamError: Axis must be 0 or 1");
        }

        const newData = this.$getDataByAxisWithMissingValuesRemoved(axis)
        const resultArr = newData.map(arr => {
            const tempMode = mode(arr)
            if (tempMode.length === 1) {
                return tempMode[0]
            } else {
                return tempMode[keep]
            }
        })
        if (axis === 0) {
            return new Series(resultArr, { index: this.columns });
        } else {
            return new Series(resultArr, { index: this.index });
        }

    }

    /**
     * Return minimum of values in a DataFrame across specified axis.