Mercurial > hg > camir-aes2014
diff toolboxes/graph_visualisation/share/man/man1/neato.1 @ 0:e9a9cd732c1e tip
first hg version after svn
| author | wolffd |
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| date | Tue, 10 Feb 2015 15:05:51 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/toolboxes/graph_visualisation/share/man/man1/neato.1 Tue Feb 10 15:05:51 2015 +0000 @@ -0,0 +1,725 @@ +.TH DOT 1 "23 August 2004" \*(eX +.SH NAME +dot \- filter for drawing directed graphs +.br +neato \- filter for drawing undirected graphs +.br +twopi \- filter for radial layouts of graphs +.br +circo \- filter for circular layout of graphs +.br +fdp \- filter for drawing undirected graphs +.br +sfdp \- filter for drawing large undirected graphs +.SH SYNOPSIS +\fBdot\fR +[\fB\-\fR(\fBG\fR|\fBN\fR|\fBE\fR)\fIname=value\fR] +[\fB\-T\fIlang\fR] +[\fB\-l\fIlibfile\fR] +[\fB\-o\fIoutfile\fR] +[\fB\-K\fIlayout\fR] +[\fB\-O\fR] +[\fB\-P\fR] +[\fB\-v\fR] +[\fB\-V\fR] +[files] +.br +\fBneato\fR +[\fB\-\fR(\fBG\fR|\fBN\fR|\fBE\fR)\fIname=value\fR] +[\fB\-T\fIlang\fR] +[\fB\-l\fIlibfile\fR] +[\fB\-n\fR[\fB1\fR|\fB2\fR]] +[\fB\-o\fIoutfile\fR] +[\fB\-K\fIlayout\fR] +[\fB\-O\fR] +[\fB\-P\fR] +[\fB\-v\fR] +[\fB\-V\fR] +[files] +.br +\fBtwopi\fR +[\fB\-\fR(\fBG\fR|\fBN\fR|\fBE\fR)\fIname=value\fR] +[\fB\-T\fIlang\fR] +[\fB\-l\fIlibfile\fR] +[\fB\-o\fIoutfile\fR] +[\fB\-K\fIlayout\fR] +[\fB\-O\fR] +[\fB\-P\fR] +[\fB\-v\fR] +[\fB\-V\fR] +[files] +.br +\fBcirco\fR +[\fB\-\fR(\fBG\fR|\fBN\fR|\fBE\fR)\fIname=value\fR] +[\fB\-T\fIlang\fR] +[\fB\-l\fIlibfile\fR] +[\fB\-o\fIoutfile\fR] +[\fB\-K\fIlayout\fR] +[\fB\-O\fR] +[\fB\-P\fR] +[\fB\-v\fR] +[\fB\-V\fR] +[files] +.br +\fBfdp\fR +[\fB\-\fR(\fBG\fR|\fBN\fR|\fBE\fR)\fIname=value\fR] +[\fB\-T\fIlang\fR] +[\fB\-l\fIlibfile\fR] +[\fB\-o\fIoutfile\fR] +[\fB\-K\fIlayout\fR] +[\fB\-O\fR] +[\fB\-P\fR] +[\fB\-v\fR] +[\fB\-V\fR] +[files] +.br +\fBsfdp\fR +[\fB\-\fR(\fBG\fR|\fBN\fR|\fBE\fR)\fIname=value\fR] +[\fB\-T\fIlang\fR] +[\fB\-l\fIlibfile\fR] +[\fB\-o\fIoutfile\fR] +[\fB\-K\fIlayout\fR] +[\fB\-O\fR] +[\fB\-P\fR] +[\fB\-v\fR] +[\fB\-V\fR] +[files] +.SH DESCRIPTION +.I dot +draws directed graphs. It works well on DAGs and other graphs +that can be drawn as hierarchies. +It reads attributed graph files and writes drawings. +By default, the output format +.I dot +is the input file with layout coordinates appended. +.PP +.I neato +draws undirected graphs using ``spring'' models (see Kamada and Kawai, +Information Processing Letters 31:1, April 1989). Input files must be +formatted in the +.I dot +attributed graph language. +By default, the output of +.I neato +is the input graph with layout coordinates appended. +.PP +.I twopi +draws graphs using a radial layout (see G. Wills, +Symposium on Graph Drawing GD'97, September, 1997). +Basically, one node is chosen as the center and put at the origin. +The remaining nodes are placed on a sequence of concentric circles +centered about the origin, each a fixed radial distance from the +previous circle. +All nodes distance 1 from the center are placed on the first circle; +all nodes distance 1 from a node on the first circle are placed on +the second circle; and so forth. +.PP +.I circo +draws graphs using a circular layout (see +Six and Tollis, GD '99 and ALENEX '99, and +Kaufmann and Wiese, GD '02.) +The tool identifies biconnected components and draws the nodes of +the component on a circle. The block\(hycutpoint tree +is then laid out using a recursive radial algorithm. Edge +crossings within a circle are minimized by placing as many edges on +the circle's perimeter as possible. +In particular, if the component is outerplanar, the component will +have a planar layout. +.PP +If a node belongs to multiple non\(hytrivial biconnected components, +the layout puts the node in one of them. By default, this is the first +non\(hytrivial component found in the search from the root component. +.PP +.I fdp +draws undirected graphs using a ``spring'' model. It relies on a +force\(hydirected approach in the spirit of Fruchterman and Reingold +(cf. Software\(hyPractice & Experience 21(11), 1991, pp. 1129\(hy1164). +.PP +.I sfdp +also draws undirected graphs using the ``spring'' model described +above, but it uses a multi-scale approach to produce layouts +of large graphs in a reasonably short time. +.SH OUTPUT FORMATS +Dot uses an extensible plugin mechanism for its output renderers, +so to see what output formats your installation of dot supports +you can use ``dot \-Txxx'' (where xxx is an unlikely format) +and check the warning message. +Also, The plugin mechanism supports multiple implementations +of the output formats. +To see what variants are available, use, for example: ``dot \-Tpng:'' +and to force a particular variant, use, for example: ``dot \-Tpng:gd'' +.P +Traditionally, dot supports the following: +\fB\-Tps\fP (PostScript), +\fB\-Tsvg\fP \fB\-Tsvgz\fP (Structured Vector Graphics), +\fB\-Tfig\fP (XFIG graphics), +\fB\-Tmif\fP (FrameMaker graphics), +\fB\-Thpgl\fP (HP pen plotters), and \fB\-Tpcl\fP (Laserjet printers), +\fB\-Tpng\fP \fB\-Tgif\fP (bitmap graphics), +\fB\-Tdia\fP (GTK+ based diagrams), +\fB\-Timap\fP (imagemap files for httpd servers for each node or edge +that has a non\(hynull "href" attribute.), +\fB\-Tcmapx\fP (client\(hyside imagemap for use in html and xhtml). +Additional less common or more special\(hypurpose output formats +can be found at http://www.graphviz.org/cvs/doc/info/output.html.) +.P +Alternative plugins providing support for a given output format +can be found from the error message resulting from appending a ':' to the format. e.g. \fB-Tpng:\fP +The first plugin listed is always the default. +.P +The \fB\-P\fP switch can be used to produce a graph of all output variants supported by plugins in the local installation of graphviz. +.SH GRAPH FILE LANGUAGE +Here is a synopsis of the graph file language, traditionally using the extension \fB.dot\fR, for graphs: +.PP +[\fBstrict\fR] (\fBgraph\fR|\fBdigraph\fR) \fIname\fP { \fIstatement\(hylist\fP }\fR +.br +Is the top level graph. If the graph is \fBstrict\fR then multiple edges are +not allowed between the same pairs of nodes. +If it is a directed graph, indicated by \fBdigraph\fR, +then the \fIedgeop\fR must be "\->". If it is an undirected \fBgraph\fR +then the \fIedgeop\fR must be "\-\-". +Statements may be: +.PP +\fIname\fB=\fIval\fB;\fR +.br +\fBnode [\fIname\fB=\fIval\fB];\fR +.br +\fBedge [\fIname\fB=\fIval\fB];\fR +.br +Set default graph, node, or edge attribute \fIname\fP to \fIval\fP. +Any subgraph, node, or edge appearing after this inherits the new +default attributes. +.PP +\fBn0 [\fIname0=val0,name1=val1,...\fB];\fR +Creates node \fBn0\fP (if it does not already exist) +and sets its attributes according to the optional list. +.PP +\fBn0 \fIedgeop\fR n1 \fIedgeop\fR \fI...\fB \fIedgeop\fR nn [\fIname0=val0,name1=val1,...\fB];\fR +.br +Creates edges between nodes \fBn0\fP, \fBn1\fP, ..., \fBnn\fP and sets +their attributes according to the optional list. +Creates nodes as necessary. +.PP +[\fBsubgraph \fIname\fB] { \fIstatement\(hylist \fB}\fR +.br +Creates a subgraph. Subgraphs may be used in place +of \fBn0\fP, ..., \fBnn\fP in the above statements to create edges. +[\fBsubgraph \fIname\fR] is optional; +if missing, the subgraph is assigned an internal name. +.PP +Comments may be /*C\(hylike*/ or //C++\(hylike. + +.PP +Attribute names and values are ordinary (C\(hystyle) strings. +The following sections describe attributes that control graph layout. + +.SH "GRAPH ATTRIBUTES" +.PP +\fBsize="\fIx,y\fP"\fR sets bounding box of drawing in inches. +.PP +\fBpage="\fIx,y\fP"\fR sets the PostScript pagination unit. +.PP +\fBratio=\fIf\fR sets the aspect ratio to \fIf\fP which may be +a floating point number, or one of the keywords \fBfill\fP, +\fBcompress\fP, or \fBauto\fP. +.PP +\fBlayout=\fIengine\fR indicates the preferred layout engine ("dot", "neato", fdp" etc) overriding the default from the basename of the command or the -K commandline option. +.PP +\fBmargin=\fIf\fR sets the page margin (included in the page size). +.PP +\fBnodesep=\fIf\fR sets the minimum separation between nodes. +.PP +\fBranksep=\fIf\fR sets the minimum separation between ranks. +.PP +\fBordering=out\fR constrains order of out\(hyedges in a subgraph +according to their file sequence. +.PP +\fBrankdir=LR|RL|BT\fR requests a left\(hyto\(hyright, right\(hyto\(hyleft, or bottom\(hyto\(hytop, drawing. +.PP +\fBpagedir=\fR[TBLR][TBLR] sets the major and minor order of pagination. +.PP +\fBrank=same\fR (or \fBmin\fP or \fBmax\fP) in a subgraph +constrains the rank assignment of its nodes. If a subgraph's +name has the prefix \fBcluster\fP, its nodes are drawn in +a distinct rectangle of the layout. Clusters may be nested. +.PP +\fBrotate=90\fR sets landscape mode. +(\fBorientation=land\fR is backward compatible but obsolete.) +.PP +\fBcenter=\fIn\fR a non\(hyzero value centers the drawing on the page. +.PP +\fBnslimit=\fIf\fR or \fBmclimit=\fIf\fR adjusts the bound on the +number of network simplex or mincross iterations by the given ratio. +For example, \fBmclimit=2.0\fP runs twice as long. +.PP +\fBlayers="\fIid:id:id:id\fR" is a sequence of layer identifiers for +overlay diagrams. The PostScript array variable \fIlayercolorseq\fR +sets the assignment of colors to layers. The least index is 1 and +each element must be a 3\(hyelement array to be interpreted as a color coordinate. +.PP +\fBcolor=\fIcolorvalue\fR sets foreground color (\fBbgcolor\fP for background). +.PP +\fBhref=\fI"url"\fR the default url for image map files; in PostScript files, +the base URL for all relative URLs, as recognized by Acrobat Distiller +3.0 and up. +.PP +\fBURL=\fI"url"\fR ("URL" is a synonym for "href".) +.PP +\fBstylesheet=\fI"file.css"\fR includes a reference to a stylesheet +in \-Tsvg and \-Tsvgz outputs. Ignored by other formats. +.PP +\fBsplines\fR. If set to \fItrue\fR, edges are +drawn as splines. +If set to \fIpolyline\fR, edges are +drawn as polylines. +If set to \fIortho\fR, edges are +drawn as orthogonal polylines. +In all of these cases, the nodes may not overlap. +If \fBsplines=\fIfalse\fR or \fBsplines=\fIline\fR, edges are +drawn as line segments. +The default is \fItrue\fR for dot, and \fIfalse\fR for all other layouts. + +.PP +\fB(neato\(hyspecific attributes)\fR +.br +\fBstart=\fIval\fR. Requests random initial placement and seeds +the random number generator. If \fIval\fP is not an integer, +the process ID or current time is used as the seed. +.PP +\fBepsilon=\fIn\fR. Sets the cutoff for the solver. +The default is 0.1. + +.PP +\fB(twopi\(hyspecific attributes)\fR +.br +\fBroot=\fIctr\fR. This specifies the node to be used as the center of +the layout. If not specified, \fItwopi\fP will randomly pick one of the +nodes that are furthest from a leaf node, where a leaf node is a node +of degree 1. If no leaf nodes exists, an arbitrary node is picked as center. +.PP +\fBranksep=\fIval\fR. Specifies the radial distance in inches between +the sequence of rings. The default is 0.75. +.PP +\fBoverlap=\fImode\fR. This specifies what \fItwopi\fP should do if +any nodes overlap. If mode is \fI"false"\fP, the program uses Voronoi +diagrams to adjust the nodes to eliminate overlaps. If mode is \fI"scale"\fP, +the layout is uniformly scaled up, preserving node sizes, until nodes no +longer overlap. The latter technique removes overlaps while preserving +symmetry and structure, while the former removes overlaps more compactly +but destroys symmetries. +If mode is \fI"true"\fP (the default), no repositioning is done. + +.PP +\fB(circo\(hyspecific attributes)\fR +.br +\fBroot=\fInodename\fR. Specifies the name of a node occurring in the +root block. If the graph is disconnected, the \fBroot\fP node attribute +can be used to specify additional root blocks. +.PP +\fBmindist=\fIvalue\fR. Sets the minimum separation between all nodes. If not +specified then \fIcirco\fP uses a default value of 1.0. + +.PP +\fB(fdp\(hyspecific attributes)\fR +.br +\fBK=\fIval\fR. Sets the default ideal node separation +in the layout. +.PP +\fBmaxiter=\fIval\fR. Sets the maximum number of iterations used to +layout the graph. +.PP +\fBstart=\fIval\fR. Adjusts the random initial placement of nodes +with no specified position. If \fIval\fP is is an integer, +it is used as the seed for the random number generator. +If \fIval\fP is not an integer, a random system\(hygenerated integer, +such as the process ID or current time, is used as the seed. +.PP + +.SH "NODE ATTRIBUTES" +.PP +\fBheight=\fId\fR or \fBwidth=\fId\fR sets minimum height or width. +Adding \fBfixedsize=true\fP forces these to be the actual size +(text labels are ignored). +.PP +\fBshape=record polygon epsf \fIbuiltin_polygon\fR +.br +\fIbuiltin_polygon\fR is one of: \fBplaintext ellipse oval circle egg +triangle box diamond trapezium parallelogram house hexagon octagon +note tab box3d component.\fR +(Polygons are defined or modified by the following node attributes: +\fBregular\fR, \fBperipheries\fR, \fBsides\fR, \fBorientation\fR, +\fBdistortion\fR and \fBskew\fR.) \fBepsf\fR uses the node's +\fBshapefile\fR attribute as the path name of an external +EPSF file to be automatically loaded for the node shape. +.PP +\fBlabel=\fItext\fR where \fItext\fP may include escaped newlines +\\\|n, \\\|l, or \\\|r for center, left, and right justified lines. +The string '\\N' value will be replaced by the node name. +The string '\\G' value will be replaced by the graph name. +Record labels may contain recursive box lists delimited by { | }. +Port identifiers in labels are set off by angle brackets < >. +In the graph file, use colon (such as, \fBnode0:port28\fR). +.PP +\fBfontsize=\fIn\fR sets the label type size to \fIn\fP points. +.PP +\fBfontname=\fIname\fR sets the label font family name. +.PP +\fBcolor=\fIcolorvalue\fR sets the outline color, and the default fill color +if style=filled and \fBfillcolor\fR is not specified. +.PP +\fBfillcolor=\fIcolorvalue\fR sets the fill color +when style=filled. If not specified, the fillcolor when style=filled defaults +to be the same as the outline color. +.PP +\fBfontcolor=\fIcolorvalue\fR sets the label text color. +.PP +A \fIcolorvalue\fP may be "\fIh,s,v\fB"\fR (hue, saturation, brightness) +floating point numbers between 0 and 1, or an X11 color name such as +\fBwhite black red green blue yellow magenta cyan\fR or \fBburlywood\fR, +or a "\fI#rrggbb" (red, green, blue, 2 hex characters each) value. +.PP +\fBstyle=filled solid dashed dotted bold invis\fP or any Postscript code. +.PP +\fBlayer=\fIid\fR or \fIid:id\fR or "all" sets the node's active layers. +The empty string means no layers (invisible). +.PP +The following attributes apply only to polygon shape nodes: +.PP +\fBregular=\fIn\fR if \fIn\fR is non\(hyzero then the polygon is made +regular, i.e. symmetric about the x and y axis, otherwise the +polygon takes on the aspect ratio of the label. +\fIbuiltin_polygons\fR that are not already regular are made regular +by this attribute. +\fIbuiltin_polygons\fR that are already regular are not affected (i.e. +they cannot be made asymmetric). +.PP +\fBperipheries=\fIn\fR sets the number of periphery lines drawn around +the polygon. This value supersedes the number of periphery lines +of \fIbuiltin_polygons\fR. +.PP +\fBsides=\fIn\fR sets the number of sides to the polygon. \fIn\fR<3 +results in an ellipse. +This attribute is ignored by \fIbuiltin_polygons\fR. +.PP +\fBorientation=\fIf\fR sets the orientation of the first apex of the +polygon counterclockwise from the vertical, in degrees. +\fIf\fR may be a floating point number. +The orientation of labels is not affected by this attribute. +This attribute is added to the initial orientation of \fIbuiltin_polygons.\fR +.PP +\fBdistortion=\fIf\fR sets the amount of broadening of the top and +narrowing of the bottom of the polygon (relative to its orientation). +Floating point values between \-1 and +1 are suggested. +This attribute is ignored by \fIbuiltin_polygons\fR. +.PP +\fBskew=\fIf\fR sets the amount of right\(hydisplacement of the top and +left\(hydisplacement of the bottom of the polygon (relative to its +orientation). +Floating point values between \-1 and +1 are suggested. +This attribute is ignored by \fIbuiltin_polygons\fR. +.PP +\fBhref=\fI"url"\fR sets the url for the node in imagemap, PostScript and SVG +files. +The substrings '\\N' and '\\G' are substituted in the same manner as +for the node label attribute. +Additionally the substring '\\L' is substituted with the node label string. +.PP +\fBURL=\fI"url"\fR ("URL" is a synonym for "href".) +.PP +\fBtarget=\fI"target"\fR is a target string for client\(hyside imagemaps +and SVG, effective when nodes have a URL. +The target string is used to determine which window of the browser is used +for the URL. Setting it to "_graphviz" will open a new window if it doesn't +already exist, or reuse it if it does. +If the target string is empty, the default, +then no target attribute is included in the output. +The substrings '\\N' and '\\G' are substituted in the same manner as +for the node label attribute. +Additionally the substring '\\L' is substituted with the node label string. +.PP +\fBtooltip=\fI"tooltip"\fR is a tooltip string for client\(hyside imagemaps +and SVG, effective when nodes have a URL. The tooltip string defaults to be the +same as the label string, but this attribute permits nodes without +labels to still have tooltips thus permitting denser graphs. +The substrings '\\N' and '\\G' are substituted in the same manner as +for the node label attribute. +Additionally the substring '\\L' is substituted with the node label string. + +.PP +\fB(circo\(hyspecific attributes)\fR +.br +\fBroot=\fItrue/false\fR. This specifies that the block containing the given +node be treated as the root of the spanning tree in the layout. + +.PP +\fB(fdp\(hyspecific attributes)\fR +.br +\fBpin=\fIval\fR. If \fIval\fR is "true", the node will remain at +its initial position. + +.SH "EDGE ATTRIBUTES" +\fBminlen=\fIn\fR where \fIn\fP is an integer factor that applies +to the edge length (ranks for normal edges, or minimum node separation +for flat edges). +.PP +\fBweight=\fIn\fR where \fIn\fP is the integer cost of the edge. +Values greater than 1 tend to shorten the edge. Weight 0 flat +edges are ignored for ordering nodes. +.PP +\fBlabel=\fItext\fR where \fItext\fR may include escaped newlines +\\\|n, \\\|l, or \\\|r for centered, left, or right justified lines. +If the substring '\\T' is found in a label it will be replaced by the tail_node name. +If the substring '\\H' is found in a label it will be replaced by the head_node name. +If the substring '\\E' value is found in a label it will be replaced by: tail_node_name\->head_node_name +If the substring '\\G' is found in a label it will be replaced by the graph name. +or by: tail_node_name\-\-head_node_name for undirected graphs. +.PP +\fBfontsize=\fIn\fR sets the label type size to \fIn\fP points. +.PP +\fBfontname=\fIname\fR sets the label font family name. +.PP +\fBfontcolor=\fIcolorvalue\fR sets the label text color. +.PP +\fBstyle=solid dashed dotted bold invis\fP +.PP +\fBcolor=\fIcolorvalue\fR sets the line color for edges. +.PP +\fBcolor=\fIcolorvaluelist\fR a ':' separated list of \fIcolorvalue\fR creates +parallel edges, one edge for each color. +.PP +\fBdir=forward back both none\fP controls arrow direction. +.PP +\fBtailclip,headclip=false\fP disables endpoint shape clipping. +.PP +\fBhref=\fI"url"\fR sets the url for the node in imagemap, PostScript and SVG +files. +The substrings '\\T', '\\H', '\\E' and '\\G' are substituted in the same manner as +for the edge label attribute. +Additionally the substring '\\L' is substituted with the edge label string. +.PP +\fBURL=\fI"url"\fR ("URL" is a synonym for "href".) +.PP +\fBtarget=\fI"target"\fR is a target string for client\(hyside imagemaps +and SVG, effective when edges have a URL. +If the target string is empty, the default, +then no target attribute is included in the output. +The substrings '\\T', '\\H', '\\E' and '\\G' are substituted in the same manner as +for the edge label attribute. +Additionally the substring '\\L' is substituted with the edge label string. +.PP +\fBtooltip=\fI"tooltip"\fR is a tooltip string for client\(hyside imagemaps +effective when edges have a URL. The tooltip string defaults to be the +same as the edge label string. +The substrings '\\T', '\\H', '\\E' and '\\G' are substituted in the same manner as +for the edge label attribute. +Additionally the substring '\\L' is substituted with the edge label string. +.PP +\fBarrowhead,arrowtail=none, normal, inv, dot, odot, invdot, invodot, +tee, empty, invempty, open, halfopen, diamond, odiamond, box, obox, crow\fP. +.PP +\fBarrowsize\fP (norm_length=10,norm_width=5, +inv_length=6,inv_width=7,dot_radius=2) +.PP +\fBheadlabel,taillabel=string\fP for port labels. +\fBlabelfontcolor\fP,\fBlabelfontname\fP,\fBlabelfontsize\fP +for head and tail labels. +The substrings '\\T', '\\H', '\\E' and '\\G' are substituted in the same manner as +for the edge label attribute. +Additionally the substring '\\L' is substituted with the edge label string. +.PP +\fBheadhref=\fI"url"\fR sets the url for the head port in imagemap, PostScript and SVG files. +The substrings '\\T', '\\H', '\\E' and '\\G' are substituted in the same manner as +for the edge label attribute. +Additionally the substring '\\L' is substituted with the edge label string. +.PP +\fBheadURL=\fI"url"\fR ("headURL" is a synonym for "headhref".) +.PP +\fBheadtarget=\fI"headtarget"\fR is a target string for client\(hyside imagemaps +and SVG, effective when edge heads have a URL. +The headtarget string is used to determine which window of the browser is used +for the URL. If the headtarget string is empty, the default, +then headtarget defaults to the same value as target for the edge. +The substrings '\\T', '\\H', '\\E' and '\\G' are substituted in the same manner as +for the edge label attribute. +Additionally the substring '\\L' is substituted with the edge label string. +.PP +\fBheadtooltip=\fI"tooltip"\fR is a tooltip string for client\(hyside imagemaps +effective when head ports have a URL. The tooltip string defaults to be the +same as the headlabel string. +The substrings '\\T', '\\H', and '\\E' are substituted in the same manner as +for the edge label attribute. +Additionally the substring '\\L' is substituted with the edge label string. +.PP +\fBtailhref=\fI"url"\fR sets the url for the tail port in imagemap, PostScript and SVG files. +The substrings '\\T', '\\H', '\\E' and '\\G' are substituted in the same manner as +for the edge label attribute. +Additionally the substring '\\L' is substituted with the edge label string. +.PP +\fBtailURL=\fI"url"\fR ("tailURL" is a synonym for "tailhref".) +.PP +\fBtailtarget=\fI"tailtarget"\fR is a target string for client\(hyside imagemaps +and SVG, effective when edge tails have a URL. +The tailtarget string is used to determine which window of the browser is used +for the URL. If the tailtarget string is empty, the default, +then tailtarget defaults to the same value as target for the edge. +The substrings '\\T', '\\H', '\\E' and '\\G' are substituted in the same manner as +for the edge label attribute. +Additionally the substring '\\L' is substituted with the edge label string. +.PP +\fBtailtooltip=\fI"tooltip"\fR is a tooltip string for client\(hyside imagemaps +effective when tail ports have a URL. The tooltip string defaults to be the +same as the taillabel string. +The substrings '\\T', '\\H', '\\E' and '\\G' are substituted in the same manner as +for the edge label attribute. +Additionally the substring '\\L' is substituted with the edge label string. +.PP +\fBlabeldistance\fP and \fPport_label_distance\fP set distance; also +\fBlabelangle\fP (in degrees CCW) +.PP +\fBdecorate\fP draws line from edge to label. +.PP +\fBsamehead,sametail\fP aim edges having the same value to the +same port, using the average landing point. +.PP +\fBconstraint=false\fP causes an edge to be ignored for rank assignment. +.PP +\fBlayer=\fIid\fR or \fIid:id\fR or "all" sets the edge's active layers. +The empty string means no layers (invisible). + +.PP +\fB(neato\(hyspecific attributes)\fR +.br +\fBw=\fIf\fR sets the weight (spring constant) of an edge +to the given floating point value. The default is 1.0; +greater values make the edge tend more toward its optimal length. +.PP +\fBlen=\fIf\fR sets the optimal length of an edge. +The default is 1.0. +.PP +\fB(fdp\(hyspecific attributes)\fR +.br +\fBweight=\fIf\fR sets the weight of an edge +to the given floating point value. The default is 1.0; +greater values make the edge tend more toward its optimal length. +.SH "COMMAND LINE OPTIONS" +\fB\-G\fP sets a default graph attribute. +.br +\fB\-N\fP sets a default node attribute. +.br +\fB\-E\fP sets a default edge attribute. +Example: \fB\-Gsize="7,8" \-Nshape=box \-Efontsize=8\fR +.PP +\fB\-l\fIfile\fR loads custom PostScript library files. +Usually these define custom shapes or styles. +If \fB\-l\fP is given by itself, the standard library is omitted. +.PP +\fB\-T\fIlang\fR sets the output language as described above. + +.PP +\fB\-n\fR[\fB1\fR|\fB2\fR] (no\(hyop) +If set, neato assumes nodes have already been positioned and all +nodes have a pos attribute giving the positions. +It then performs an optional adjustment to remove node\(hynode overlap, +depending on the value of the overlap attribute, +computes the edge layouts, depending on the value of the \fBsplines\fR attribute, +and emits the graph in the appropriate format. +If num is supplied, the following actions occur: +.nf + num = 1 +.fi +Equivalent to \-n. +.nf + num > 1 +.fi +Use node positions as specified, +with no adjustment to remove node\(hynode overlaps, +and use any edge layouts already specified by the pos attribute. +neato computes an edge layout for any edge that does not have a pos attribute. +As usual, edge layout is guided by the \fBsplines\fR attribute. +.PP +\fB\-K\fIlayout\fR override the default layout engine implied by the command name. +.PP +\fB\-O\fP automatically generate output filenames based on the input filename and the -T format. +.PP +\fB\-P\fP generate a graph of the currently available plugins. +.PP +\fB\-v\fP (verbose) prints various information useful for debugging. +.PP +\fB\-V\fP (version) prints version information and exits. +.PP +\fB\-?\fP prints the usage and exits. +.SH "EXAMPLES" +.nf +digraph test123 { + a \-> b \-> c; + a \-> {x y}; + b [shape=box]; + c [label="hello\\\|nworld",color=blue,fontsize=24, + fontname="Palatino\-Italic",fontcolor=red,style=filled]; + a \-> z [label="hi", weight=100]; + x \-> z [label="multi\-line\\\|nlabel"]; + edge [style=dashed,color=red]; + b \-> x; + {rank=same; b x} +} +.fi +.PP +.nf +graph test123 { + a \-\- b \-\- c; + a \-\- {x y}; + x \-\- c [w=10.0]; + x \-\- y [w=5.0,len=3]; +} +.fi +.SH "CAVEATS" +Edge splines can overlap unintentionally. +.PP +Flat edge labels are slightly broken. +Intercluster edge labels are totally broken. +.PP +Because unconstrained optimization is employed, node boxes can +possibly overlap or touch unrelated edges. All existing +spring embedders seem to have this limitation. +.PP +Apparently reasonable attempts to pin nodes or adjust edge lengths +and weights can cause instability. +.SH AUTHORS +Stephen C. North <north@research.att.com> +.br +Emden R. Gansner <erg@research.att.com> +.br +John C. Ellson <ellson@research.att.com> +.PP +The bitmap driver (PNG, GIF etc) is by Thomas Boutell, <http://www.boutell.com/gd> +.PP +The Truetype font renderer is from +the Freetype Project (David Turner, Robert Wilhelm, and Werner Lemberg) +(who can be contacted at freetype\-devel@lists.lrz\-muenchen.de). +.SH "SEE ALSO" +This man page contains only a small amount of the information related +to the Graphviz layout programs. The most complete information can be +found at http://www.graphviz.org/Documentation.php, especially in the +on\(hyline reference pages. Most of these documents are also available in the +\fIdoc\fP and \fIdoc/info\fP subtrees in the source and binary distributions. +.PP +dotty(1) +.br +tcldot(n) +.br +xcolors(1) +.br +libgraph(3) +.PP +E. R. Gansner, S. C. North, K. P. Vo, "DAG \(hy A Program to Draw Directed Graphs", Software \(hy Practice and Experience 17(1), 1988, pp. 1047\(hy1062. +.br +E. R. Gansner, E. Koutsofios, S. C. North, K. P. Vo, "A Technique for Drawing Directed Graphs," IEEE Trans. on Soft. Eng. 19(3), 1993, pp. 214\(hy230. +.br +S. North and E. Koutsofios, "Applications of graph visualization", +Graphics Interface 94, pp. 234\(hy245. +.br +E. Koutsofios and S. C. North, "Drawing Graphs with dot," +Available on research.att.com in dist/drawdag/dotguide.ps.Z. +.br +S. C. North, "NEATO User's Manual". +Available on research.att.com in dist/drawdag/neatodoc.ps.Z.