Method lt

src/danfojs-base/core/frame.ts:1097–1110

* Get Less than of dataframe and other, element-wise (binary operator lt). * @param other DataFrame, Series, Array or Scalar number to compare with * @param options.axis 0 or 1. If 0, add column-wise, if 1, add row-wise * @example * ``` * const df = new DataFrame([[1, 2], [3

(other: DataFrame | Series | number | Array<number>, options?: { axis?: 0 | 1 })

     * ```
    */
    lt(other: DataFrame | Series | number | Array<number>, options?: { axis?: 0 | 1 }): DataFrame {
        const { axis } = { axis: 1, ...options }

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

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

        const tensors = this.$getTensorsForArithmeticOperationByAxis(other, axis);
        return this.$logicalOps(tensors, "lt")
    }

    /**
     * Returns "greater than" of dataframe and other.