getDefaultOptions {RGraph2js} | R Documentation

## Generate a list containing parameters for the D3js component's options with default values

### Description

Generate a list containing parameters for the D3js component's options with default values

### Usage

    getDefaultOptions()

### Value

`list` of parameters with default values

### Description of the available options

w : width of the component in pixels
h : height of the component in pixels
minZoomFactor : float [0,n], 1 means 100%
maxZoomFactor : float [0,n], 1 means 100%
layout_forceLinkDistance : float
If distance is specified, sets the target distance between linked nodes to the specified value. If distance is not specified, returns the layout's current link distance, which defaults to 20. Typically, the distance is specified in pixels; however, the units are arbitrary relative to the layout's size.
layout_forceCharge : float
If charge is specified, sets the charge strength to the specified value. If charge is not specified, returns the current charge strength, which defaults to -900. A negative value results in node repulsion, while a positive value results in node attraction. For graph layout, negative values should be used; for n-body simulation, positive values can be used. All nodes are assumed to be infinitesimal points with equal charge and mass. Charge forces are implemented efficiently via the Barnes-Hut algorithm, computing a quadtree for each tick. Setting the charge force to zero disables computation of the quadtree, which can noticeably improve performance if you do not need n-body forces.
layout_linkStrength : float [0,1]
If strength is specified, sets the strength (rigidity) of links to the specified value in the range [0,1]. If strength is not specified, returns the layout's current link strength, which defaults to 1.
layout_friction : float
If friction is specified, sets the friction coefficient to the specified value. If friction is not specified, returns the current coefficient, which defaults to 0.9. The name of this parameter is perhaps misleading; it does not correspond to a standard physical coefficient of friction. Instead, it more closely approximates velocity decay: at each tick of the simulation, the particle velocity is scaled by the specified friction. Thus, a value of 1 corresponds to a frictionless environment, while a value of 0 freezes all particles in place. Values outside the range [0,1] are not recommended and may have destabilizing effects.
layout_chargeDistance : float
If distance is specified, sets the maximum distance over which charge forces are applied. If distance is not specified, returns the current maximum charge distance, which defaults to infinity. Specifying a finite charge distance improves the performance of the force layout and produces a more localized layout; distance-limited charge forces are especially useful in conjunction with custom gravity.
layout_theta : float
If theta is specified, sets the Barnes-Hut approximation criterion to the specified value. If theta is not specified, returns the current value, which defaults to 0.8. Unlike links, which only affect two linked nodes, the charge force is global: every node affects every other node, even if they are on disconnected subgraphs. To avoid quadratic performance slowdown for large graphs, the force layout uses the Barnes-Hut approximation which takes O(n log n) per tick. For each tick, a quadtree is created to store the current node positions; then for each node, the sum charge force of all other nodes on the given node are computed. For clusters of nodes that are far away, the charge force is approximated by treating the distance cluster of nodes as a single, larger node. Theta determines the accuracy of the computation: if the ratio of the area of a quadrant in the quadtree to the distance between a node to the quadrant's center of mass is less than theta, all nodes in the given quadrant are treated as a single, larger node rather than computed individually.
layout_gravity : float
If gravity is specified, sets the gravitational strength to the specified value. If gravity is not specified, returns the current gravitational strength, which defaults to 0.1. The name of this parameter is perhaps misleading; it does not correspond to physical gravity (which can be simulated using a positive charge parameter). Instead, gravity is implemented as a weak geometric constraint similar to a virtual spring connecting each node to the center of the layout's size. This approach has nice properties: near the center of the layout, the gravitational strength is almost zero, avoiding any local distortion of the layout; as nodes get pushed farther away from the center, the gravitational strength becomes strong in linear proportion to the distance. Thus, gravity will always overcome repulsive charge forces at some threshold, preventing disconnected nodes from escaping the layout. Gravity can be disabled by setting the gravitational strength to zero. If you disable gravity, it is recommended that you implement some other geometric constraint to prevent nodes from escaping the layout, such as constraining them within the layout's bounds.
maxLayoutIterations : the max allowed number to perform
displayNetworkEveryNLayoutIterations : 1 means always, 0 to display only on layout completion
optimizeDisplayWhenLayoutRunning : boolean, TRUE to simplify the display when the layout engine is running
FALSE otherwise.
nodeSize : size of the node in pixels
nodeRoundedCornerPixels : apply rounded corners on rectangle like shapes
displayNodeLabels : boolean, display node names besides them
nodeBorderColor : RGB hex color
leadingNodeBorderColor : RGB hex color
noneLeadingNodeOpacity : float [0,1], 1 means fully opaque
nodeLabelsColor : RGB hex color, example "#444444"
nodeLabelsFont : example "6px sans-serif"
dragNodeBorderColor : the node border color to apply on dragging
selectNodeBorderColor : the node border color to apply on left-click, "#ff0000"
displayBarPlotsInsideNodes : boolean, display barplots inside nodes
barplotInNodeTooltips : boolean, display barplots inside node's tooltips
barplotInsideNodeBorderColor : the barplot borders color, example '#000000'
barplotInsideNodeBorderWidth : the barplot borders width in pixels, example '2px'
nodeTooltipOpacity : float [0,1], 1 means fully opaque (for link tooltips as well)
displayBarplotTooltips : boolean, (dis/en)able tooltips for each barplot's bar
nodeTooltipActivationDelay : milliseconds (for link tooltips as well)
nodeTooltipDeactivationDelay : milliseconds (for link tooltips as well)
barplotInNodeTooltipsFontSize : pixels
enableNodeDragging : boolean, allow/deny node dragging
jsFunctionToCallOnNodeClick : name of the javascript function to call on node click
example:
To call the following function
var myfunction = function(nodeObj) alert(nodeObj.name); ;
you should set jsFunctionToCallOnNodeClick='myfunction'
displayColorScale : show a color scale in the toolbar
scaleGradient : define the linear color gradient
Linear gradient format is "<angle>-<colour>[-<colour>[:<offset>]]*-<colour>"
examples: "90-#fff-#000" => 90 degree gradient from white to black
"0-#fff-#f00:20-#000" -> 0 degree gradient from white via red (at 20%) to black.
scaleLabelsFontFamily : example "monospace"
scaleLabelsFontSize : in pixels
scaleHeight : in pixels
scaleTickSize : in pixels
scaleTicksPercents : to draw a tick every 20%: "[20,40,60,80,100]"
exportCGI : boolean, enable a CGI convertion in the export function, permit only the SVG export otherwise

### Author(s)

Sylvain Gubian DL.RSupport@pmi.com

### Examples

    v <- c(0, 0, 1, 1, 0,
           0, 0, 0, 0, 0,
          -1, 0, 0, 1, 0)
    a <- matrix(v, 3, 5)
    colnames(a) <- LETTERS[1:5]
    rownames(a) <- LETTERS[1:3]

    opts <- getDefaultOptions()
    opts$nodeLabelsFont <- '16px sans-serif'

    g <- graph2js(A=a, opts=opts)

[Package RGraph2js version 1.16.0 Index]