Statistics can be created for files, compensated files, and gates. To create a statistic, select the Statistic button from the side panel. There are several different statistics that can be added. If statistics are added to compensated files, the stat is calculated after compensation is applied.
Calculated by adding the values of all events for a parameter and diving by the total number of events.
Calculated by taking the common logarithm of each event for a parameter, dividing the sum by the total number of events and then raising 10^(result). Problems can occur if any event value is zero because Log(0) is undefined. A lot of datasets contain values of zero for events and therefore adjustments need to be made to the geometric mean formula to produce a meaningful result. There are multiple ways to get around this problem. We chose to do one of the easier methods - we add 1 to all values before the calculation and then subtract one from the final result.
Equivalent to taking 50th percentile.
Standard Deviation - Calculated by first finding the mean for all the events for a parameter. Then for each event, we find the square of its distance to the mean and sum them. Then we divide by the the total number of events and take the square root.
Coefficient of Variation - the ratio between the standard deviation and mean.
Pearson Correlation Coefficient for two parameters. Calculated with the following:
r = Σ(xᵢ - x̄)(yᵢ - ȳ) / sqrt(Σ(xᵢ - x̄)² * Σ(yᵢ - ȳ)²)
The number of events that are contained within the population.
Calculated by taking the number of events in a population divided by the number of events in the file.
Calculated by taking the number of events in a population divided by the number of events in its parent. If this stat is applied to a population without a parent (a file for instance), the percent will be 100%.
The value below which a certain percentage of events (cells) in a dataset would be found.
Double click on a statistic to bring up its menu. Clicking delete in the menu will remove the stat.
Statistics can be dragged and dropped onto other files, compensated files, or gates.
Statistics can be exported to a CSV file which can be opened in any spreadsheet-type application (Excel) for further analysis. To export stats, click "File" then "Save CSV File". When exported, all statistics from all open files in the current project will be tabulated.