Comparing data from two or more files often gives useful information or results. For example, you may wish to compare the separate data sets of simulator output and observed values, or multiple simulator runs. Tecplot RS contains several tools that allow you to compare data sets.
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The method used to compare data sets depends upon both the contents of the data sets and the type of plot you wish to create:
• Using the Compare Toggle This powerful option serves as the primary method for comparing data files. It allows you to create unique style sets for each file (used when comparing a large number of files simultaneously), delta plots, and a comparison legend. With this option, Tecplot RS plots your comparison data in a single frame.
You can use the Compare toggle for XY Variables, XY Entities, XY Custom Plot and XY Custom Entities plot types. However, to use this option, all of the files must use identical names for each entity you wish to compare. The files must also use identical variable names, unless you link the variable names with an alias, which may be set using the Variables tab on the Plot Options dialog. If your files do not meet the requirements for compared entities and identical/aliased variables, use one of the alternate comparison methods.
• Comparison Using the XY Freestyle Plot Type Use this option when the entity/variable names in the files you wish to compare do not match and you would like full control over every aspect of your plots. This option allows you to compare data sets in the same frame or in side-by-side frames. Because this option requires manual setup, you may find it requires more time to set up and operate than the other options.
• Comparison Using the History Match Plot Type Use the History Match plot type when you wish to compare one set of data (history, or observed, data) with one or more simulation data sets, and/or you wish to use a more quantitative measurement to determine which simulation data set best matches the history data set. This plot type displays three different plot representations of the comparison side-by-side, requires little manual setup, and gives both qualitative and quantitative results.
Each comparison method require the steps described in Section 10 - 1 “Preparing for Comparison”. Review these steps before you begin.
You can also compare variable values from different XY data files for the same set of wells using Delta bubbles. Refer to “Delta Bubble Plots” on page 166 for details.