# IBM Visualization Data Explorer User's Guide

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## New Modules

This section contains only summaries. See IBM Visualization Data Explorer User's Reference for details. Alternatively, you can click on a module name to go directly to that module's description.

AutoGrid | This module provides much of the function of the existing module Regrid. However it automatically will construct a grid for you rather than requiring you to create one.
Categorize | Categorizes data, replacing the categorized component by a list of indices into a lookup component. Among other things, allows string data to be categorized.
CategoryStatistics | Computes statistics on categorical data.
ChangeGroupMember | Allows you to insert a new member into a group, or replace a member of a group.
ChangeGroupType | Allows you to change the type of a group (for example from a generic group to a series)
CopyContainer | Allows you to copy the header of an object.
Describe | This module is used to "describe" an input object. For example, it will tell you the structure of the object (how many data points, the bounding box, etc.) It can also tell you whether or not it is ready to be rendered (i.e., is a valid input to the image tool).
DXLInputNamed | Similar to DXLInput, but allows you to specify the name of the DXLink variable by passing it into the module rather than via the configuration dialog box for the module.
ImportSpreadsheet | Imports tabular (spreadsheet) data.
Legend | Creates a legend bar, which is similar to a color bar, but which associates colors with strings. The Legend module also accepts a colormap for the second parameter (colorlist). If a colormap is given, then the colors corresponding to the integers 0, ..., n-1, where n is the number of items in the stringlist (first parameter) are assumed.
Lookup | Use one object to lookup the value of another object in a field. This module is especially useful with categorical data.
QuantizeImage | Allows you to create a "delayed colors" image from any image. You specify the number of colors to use and the module will choose the best set of colors to represent the image.
ReadImageWindow | Allows you to obtain the image (that is, the field of pixels) from a Display or Image window. (ReadImageWindow is called internally by the Image tool, when necessary to save a displayed image)
ScaleScreen | Scales all screen objects (i.e. captions, color bars, text glyphs) by a specified amount. Used internally by the Image tool to make sure that rerendered images remain WYSIWYG.
SimplifySurface | Reduces the number of triangles in a surface.
SuperviseState | Used with SuperviseWindow to create and manage windows. This pair of modules allows you to directly specify what actions should take place for a given mouse or keyboard event in the window. This is in contrast to the use of the Image window, where mouse actions are predefined by Data Explorer (i.e. rotation or pan/zoom mode).
SuperviseWindow | See SuperviseState.

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