WTT User's Guide
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# Plot Features

Recommended values be view graphically in the Graphical Plot window. [Note: The window uses Adobe Flash technology for display; if an appropriate plug-in is not installed on the client computer, plotting is not possible.] If the recommended model has underlying experimental or predicted data of the same type, these will be plotted on the chart for comparison. The property value and associated reference can be viewed by hovering the mouse cursor over a point of interest. Experimental data are displayed as black squares and predicted values are displayed as blue circles. On multi-dimesional plots, data are displayed in deviation plots only. A region on the plot can be magnified up to forty times by clicking and dragging across a region of interest.

In order to manipulate the plot, window-specific menus are available. Not all options below are available on every plot. Unsupported features will either be "grayed out" or not present in the menus. The menus and their possible contents are:

• Display:
• Show/Hide Legend: Display a legend on the bottom of the plot
• Show/Hide Uncertainty Estimates: Show or hide the error bars on displayed experimental and predicted data.
• Show/Hide Predicted Data: Show or hide predicted values on the plot.
• Show/Hide Rejected Data: Show or hide any experimental data points that were rejected during the critical evaluation process. See [1, 2, 3, 4, 5, 6] for details on the decision criteria. Rejected data are rendered as orange triangles.
• X Axis:
• If a mathematical model is multivariant, the independent variable of the plot can be specified by the first elements of the X Axis. For example, for the Tait equation, the first two entries in the X Axis menu are:
Temperature
Pressure
• Normal scale: Set the x-axis to a standard, linear scale (x)
• Inverse scale: Plot the multiplicative inverse of the x-axis variable, 1/x
• Logarithmic scale: Plot the logarithm base 10 of the x-axis variable, log(x)
• Y Axis:
• Normal scale: Set the y-axis to a standard, linear scale (y)
• Inverse scale: Plot the multiplicitive inverse of the y-axis variable, 1/y
• Logarithmic scale: Plot the logarithm base 10 of the y-axis variable, log(y)
• Absolute deviation: Plot the difference between data values and the model value. If viewing multivariant data, a deviation plot must be selected to view data sets.
• Percent deviation: Plot 100 times the difference between the data values and the model value divided by the model value. If viewing multivariant data, a deviation plot must be selected to view data sets.

Certain commercial equipment, instruments, or materials are identified in this documentation only to specify system requirements. Such identification does not imply recommendation or endorsement by the National Institute of Standards and Technology, nor does it imply that the materials or equipment identified are necessarily the best available for the purpose.

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