Method isNa

src/danfojs-base/core/series.ts:746–762

* Return a boolean same-sized object indicating where elements are NaN. * NaN and undefined values gets mapped to true, and everything else gets mapped to false. * @example * ``` * const sf = new Series([1, 2, 3, 4, NaN, 6]); * console.log(sf.isNaN()); * //output [ fals

()

     * 
    */
    isNa(): Series {
        const newData = this.values.map((value) => {

            if (utils.isEmpty(value)) {
                return true;
            } else {
                return false;
            }
        })
        const sf = new Series(newData,
            {
                index: this.index,
                dtypes: ["boolean"],
                config: this.config
            });
        return sf;
    }

    /**
     * Replace all missing values with a specified value