This function is used to quantitatively analyze sum of data in proportion to specified value. For example, it is possible to obtain the ratio of sum of data for specified time in proportion to sum of all data. Select data you want to apply this method in Analysis Window and click the icon of Sum Ratio in Analysis Tool Bar. This will display a dialogue box for data setting as shown in the following figure. In this dialogue box, you can input values of Numerator and Denominator for specified range, resulting in the ratio of the sum of denominators for the specified range to the sum of numerators. Results of sum ratio by channels are shown as a bar graph in Display Window and registered at Analysis Window.