How to use the igniteui-angular-charts/ES5/igx-radial-pie-series-component.IgxRadialPieSeriesComponent function in igniteui-angular-charts

series1.angleAxis = this.angleAxis;
            const series2 = new IgxRadialAreaSeriesComponent();
            series2.name = "series2";
            series2.valueMemberPath  = "Spending";
            series2.valueAxis = this.radiusAxis;
            series2.angleAxis = this.angleAxis;

            series1.title = "Budget";
            series2.title = "Spending";
            this.chart.series.clear();
            this.chart.series.add(series1);
            this.chart.series.add(series2);

        } else if (seriesType === "Pie") {
            // creating a series with mapping to data columns of financial data
            const series1 = new IgxRadialPieSeriesComponent();
            series1.name = "series1";
            series1.valueMemberPath  = "Budget";
            series1.valueAxis = this.radiusAxis;
            series1.angleAxis = this.angleAxis;
            const series2 = new IgxRadialPieSeriesComponent();
            series2.name = "series2";
            series2.valueMemberPath  = "Spending";
            series2.valueAxis = this.radiusAxis;
            series2.angleAxis = this.angleAxis;

            series1.title = "Budget";
            series2.title = "Spending";
            this.chart.series.clear();
            this.chart.series.add(series1);
            this.chart.series.add(series2);

series2.angleAxis = this.angleAxis;

            series1.title = "Budget";
            series2.title = "Spending";
            this.chart.series.clear();
            this.chart.series.add(series1);
            this.chart.series.add(series2);

        } else if (seriesType === "Pie") {
            // creating a series with mapping to data columns of financial data
            const series1 = new IgxRadialPieSeriesComponent();
            series1.name = "series1";
            series1.valueMemberPath  = "Budget";
            series1.valueAxis = this.radiusAxis;
            series1.angleAxis = this.angleAxis;
            const series2 = new IgxRadialPieSeriesComponent();
            series2.name = "series2";
            series2.valueMemberPath  = "Spending";
            series2.valueAxis = this.radiusAxis;
            series2.angleAxis = this.angleAxis;

            series1.title = "Budget";
            series2.title = "Spending";
            this.chart.series.clear();
            this.chart.series.add(series1);
            this.chart.series.add(series2);

        } else if (seriesType === "Line") {
            // creating a series with mapping to data columns of financial data
            const series1 = new IgxRadialLineSeriesComponent();
            series1.name = "series1";
            series1.valueMemberPath  = "Budget";