# IBM Visualization Data Explorer User's Reference

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### Grid

Category

Realization

Function

Creates an output geometry.

Syntax

    grid = Grid(point, structure, shape, density);

Inputs

Name | Type | Default | Description
--- | --- | --- | ---
`point` | vector | none | starting point from which the grid is constructed
`structure` | string | "brick" | type of grid
`shape` | vector list | structure dependent | size and shape of structure
`density` | integer list | {3, 3, ...} | number of points to be put on each grid element

Outputs

Name | Type | Description
--- | --- | ---
`grid` | geometry field | output grid

Functional Details

`point` | is the starting point from which the grid is constructed.
`structure` | specifies the type of grid geometry and must be one of the following: "brick " (the default), "crosshair," "ellipse," "line," "point," or "rectangle." For a structure specified as "point," it is neither necessary nor useful to specify `shape` or `density`. For the other valid structures, the output object extends symmetrically from `point`.
`shape` | is a list of vectors that characterize the grid structure, specifying its size and orientation: A line requires one vector; rectangles and ellipses, two vectors; and bricks and crosshairs, three vectors. For "brick," the default `shape` specification is {[1 0 0] [0 1 0] [0 0 1]}; for other structures, the default specification is the appropriate corresponding vector list.
`density` | determines the number of points in the output. For crosshairs and bricks, the specification is a list of length 3; for rectangles, a list of length 2; and for the other structures, a single integer. In each case, `density` is the number of points along the edge in question. Bricks and rectangles are filled.

Note: Specifying `point` and `shape` as 2-dimensional vectors can produce a 2-dimensional output `grid` for the structures "ellipse," "line," "point," and "rectangle."

Components

Creates "positions" and "connections" components.

Example Visual Programs

    InvalidData.net
    MakeLineMacro.net
    PlotLine.net
    PlotTwoLines.net
    ThunderStreamlines.net
    SIMPLE/Grid.net

See Also

Construct, Glyph, Map, Streakline, Streamline

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