![]() Consider, for instance, that you want to create a piechart of the following variable, that represents the count of some event: count <- c(7, 25, 16, 12, 10, 30) The code for a pie chart in R is as follows. For reference, I compute the edge of a node (starting and ending point of the loop) with the inner function qgraph:::Cent2Edge and compute the shape of the loop (spline) with the inner function qgraph:::SelfLoop. The R pie function allows you to create a pie chart in R. The return value should be in the form of an edge list with a to and from column giving the indexes of the terminal nodes of the edge. So the circle is all the points (x,y) that are r away from the center (a,b). I am quite content with how these self-loops turned out and they seem to be more to what you describe. getEdges.layoutmyclass() This method takes the return value of createlayout.myclass() and returns the edges of the graph structure. Let us put a circle of radius 5 on a graph: graph circle. Usage symbols (x, y NULL, circles, squares, rectangles, stars, thermometers, boxplots, inches TRUE, add FALSE, fg par ('col'), bg NA, xlab NULL, ylab NULL, main NULL, xlim NULL, ylim NULL. Qgraph(get.adjacency(Graph,sparse=FALSE),layout=Layout,diag=TRUE,directed=TRUE) Specific aspects of the symbols, such as relative size, can be customized by additional parameters. R corrplot function is used to plot the graph of the correlation matrix. Here we add axes in the first track by putting circos.axis() inside the self-defined function panel.fun (see the code above).ack() creates plotting region in a cell-by-cell manner and the panel. It is very adapted for cyclical data though. Axes for the circular plot are normally drawn on the most outside of the circle. ![]() Note that even if visually appealing, circular barplot must be used with care since groups do not share the same Y axis. qgraph can be used to plot networks and should play nicely with igraph. This is the circular barplot section of the gallery, a variation of the well known barplot. This weekend I have updated qgraph with how self-loops work. You could plot a graph without self-loops and then add them (graphs are basically a scatterplot and you can use points and similar functions to add lines to them), but this is not trivial (especially since you need to know the edge of nodes, not their center) and will cause the selfloops to be plotted on top of everything else which might not look good. ![]() As Spacedman said, you would need to do quite some programming to do this.
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