A general frequency analysis can be started in two ways, either by right clicking on the General Frequency Analysis folder in the study explorer and selecting New, or by going to the Analysis menu and selecting New and then General Frequency Analysis. When a new General Frequency Analysis is selected, the user is required to first enter a Name for the analysis, enter an optional Description, and select a data set from the available data sets stored in the current study DSS file (see Using the HEC-SSP Data Importer for importing data into the study). The General Frequency Analysis editor will not allow further edits by the user until the name is defined and the data set is selected. The list of data that can be selected for a General Frequency Analysis will only include those data that have an irregular interval, like IR-CENTURY and IR-YEAR (E-part pathname). Once a name is entered and a flow data set is selected, the DSS File Name and Report File will automatically be populated. The DSS filename is by default a DSS file with the same name as the analysis. The report file is given the same name as the analysis with the extension ".rpt". The General Frequency Analysis editor is shown in the figure below.
General Frequency Analysis Editor.