/// <summary>
        /// Draws the DFT button click.
        /// </summary>
        /// <param name="sender">The sender.</param>
        /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
        private void DrawDftButtonClick(object sender, System.EventArgs e)
        {
            var originalValuesVector = FourierTransformUtils.GetFunctionVector(ChooseFunction.OriginalFunction);

            this.DrawOriginal(originalValuesVector, zedGraphControl1);
            DrawDFT(originalValuesVector, zedGraphControl2, zedGraphControl3, zedGraphControl4);
            label4.Text = FourierTransformUtils.Complexibility.ToString();
        }
        private void button2_Click(object sender, System.EventArgs e)
        {
            var originalValuesVector = FourierTransformUtils.GetFunctionVector(ChooseFunction.OriginalFunction);

            this.DrawOriginal(originalValuesVector, zedGraphControl8);
            DrawFFT(originalValuesVector, zedGraphControl7, zedGraphControl6, zedGraphControl5);
            label5.Text = FourierTransformUtils.Complexibility.ToString();
        }