Cognizant Management Official: John Donohue, Code 584.0
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The primary functional elements of the Data Analysis Tool consists of data selection, data display, data analysis, data export, charting set-up, charts generation, and job automation. All screen shots are at 70% of their original size.
Data selection is accomplished by first logging into a mission database
and retrieving a list of available mnemonics. The user then selects the mnemonics for analysis and, minimally, enters the time span over which to perform the analysis. The user may also filter the data by data values (e.g., values greater than 0 and less than 1, values equal to 3, etc.) or by the frequency of points (e.g., every point, every other point, every third point, etc.). The user then downloads the selected data set.Once the user has downloaded a data set, the information is available for
display in the form of tables that display the time stamp and data values for each data point. There is a search capability to find a particular data point by its time stamp. The user can also see some of the information about each mnemonic that is stored in the database (e.g., full name, limit values).Data analysis functions include data point counts, max - min - mean - std deviation
of user selected data sets and sub-sets, limit violation checks and creating data sub-sets (which can be saved to a file).Data export functions include the ability to save selected data sets to CSV format
text files (i.e., comma delimited) and, if MS Excel is installed on the user's system, to directly export to Excel (through the COM interface).This tool allows the user to select from a number of plot types (line, point, area, bar, bubble).
The user can select how the plot lines will display (line color, style, width, etc.), set scale parameters (max, min, increment, log, etc.), pick a data reduction method (high-low, mean, none) and many other details that determine how the chart will be displayed.Once all the chart parameters have been set, the user can generate four different plots
of the data. A one page chart (with data reduction if selected) and a multi-page chart of the selected data set (no data reduction) are always generated. The user can also generate charts of each mnemonic individually with the data limit lines drawn in (red and/or yellow limits if they are entered into the database). The user can generate a point plot of any one mnemonic vs. any other one mnemonic from the selected group.Once a chart or data table has been created it can be saved to a file (as a JPEG image for charts,
text format for tables), sent to the clipboard, or printed. Charts are "live" - they can be
freely zoomed and scrolled. Saved charts can be seen using the provided viewer,
to allow easier comparison between current and old charts.
See screen shot of the chart viewer
The automation capabilities allow the user to save all the current data selection
and chart set-up parameters to a configuration file. Configuration files can be loaded to reuse past settings. The configuration files can be loaded as job automation files to create tables and charts automatically using the saved parameters. The configuration files can be grouped together using job scripts to make loading easier. The jobs can then be run at user request, or automatically daily at a user set time or they can be set to run on a user set hourly basis. The user selects which products are generated and the destination of the products. The user can select to automatically FTP the generated products to a Web server for general distribution of commonly requested products. An HTML page with pointers to each generated product is automatically generated to make viewing products as easy as opening a Web page and clicking on the appropriate links (requires that a recent Web browser exist on the target system).