tkplot and its companion functions serve as an
interactive graph drawing facility. Not all parameters of the plot can
be changed interactively right now though, eg. the colors of vertices,
edges, and also others have to be pre-defined.tkplot (graph, layout = layout.random, layout.par = list(),
labels = NULL, label.color = "darkblue", label.font = NULL,
label.degree = -pi/4, label.dist = 0, vertex.color = "SkyBlue2",
vertex.size = 15, edge.color = "darkgrey", edge.width = 1,
edge.labels=NA, vertex.frame.color="black", loop.angle=0,
margin=30, ...)tkplot.close(tkp.id, window.close = TRUE)
tkplot.off()
tkplot.fit.to.screen(tkp.id, width = NULL, height = NULL)
tkplot.reshape(tkp.id, newlayout, ...)
tkplot.export.postscript(tkp.id)
tkplot.getcoords(tkp.id, norm = FALSE)
tkplot.center(tkp.id)
tkplot.rotate(tkp.id, degree = NULL, rad = NULL)
graph to plot. If it is a function, this function will be called with the
graph and layout.param as parameters
layout argument is a
function. The parameters themselves are layout function dependent,
they are discussed in the NA the plot will have no
labels, if NULL numeric ids starting from one will be
used. If a character vector of length one with prefia:a:a:a:a:a:NA which suppresses edge
labels. The vector might contain NA's as well to suppress
labels for some edges.a:layout parameter of
tkplot.tkplot returns an integer, the id of the plot, this can be used
to manipulate it from the command line. tkplot.getcoords returns a matrix with the coordinates.
tkplot.close, tkplot.off, tkplot.fit.to.screen,
tkplot.reshape, tkplot.export.postscript,
tkplot.center and tkplot.rotate return NULL
invisibly.
tkplot is an interactive graph drawing facility. It is not very
well developed at this stage, but it should be still useful.It's hangling should be quite straightforward most of the time, here are some remarks and hints.
There are different popup menus, activated by the right mouse button, for vertices and edges. Both operate on the current selection if the vertex/edge under the cursor is part of the selection and operate on the vertex/edge under the cursor if it is not.
One selection can be active at a time, either a vertex or an edge
selection. A vertex/edge can be added to a selection by holding the
control key while clicking on it with the left mouse
button. Doing this again deselect the vertex/edge.
Selections can be made also from the Select menu. The `Select
some vertices' dialog allows to give an expression for the vertices to
be selected: this can be a list of numeric R expessions separated by
commas, like `1,2:10,12,14,15' for example. Similarly in the
`Select some edges' dialog two such lists can be given and all edges
connecting a vertex in the first list to one in the second list will
be selected.
In the color dialog a color name like 'orange' or RGB notation can also be used.
The tkplot command creates a new Tk window with the graphical
representation of graph. The command returns an integer number,
the tkplot id. The other commands utilize this id to be able to
query or manipulate the plot.
tkplot.close closes the Tk plot with id tkp.id.
tkplot.off closes all Tk plots.
tkplot.fit.to.screen fits the plot to the given rectange
(width and height), if some of these are NULL
the actual phisical width od height of the plot window is used.
tkplot.reshape applies a new layout to the plot, its optional
parameters will be collected to a list analogous to layout.par.
tkplot.export.postscript creates a dialog window for saving the
plot in postscript format.
tkplot.getcoords returns the coordinates of the vertices in a
matrix. Each row corresponds to one vertex.
tkplot.center shifts the figure to the center of its plot window.
tkplot.rotate rotates the figure, its parameter can be given
either in degrees or in radians.
plot.igraph, layout