Using plot to generate a graph of a directed graph, how can i turn off the color of some lines

I am plotting digraphs of Markov matrices. I wish to use line thickness as a visual indicator of the strength or flow of the link on each edge. To do this, I must provide a non-zero thickness value for each line. This means that even lines which are not drawn must be dummied with a very tiny value in order for the links to have thicknesses proportional to the transition coefficient. I can live with that, but find I have drawn lines that cannot exist (We cannot normally go from death to a state of health). How can I change the color of these fake lines to white, so they cannot be seen? I am using the functions: tp4=TP*TP*TP*TP %raise transition probabilities to fourth power of a 6 x 6 transition matrix from health to death. tpp=tp4' %transpose to allow taking the columns wt=tpp(:) %create a vector from column values wt4=wt(1:31)*20+.01 %blow up the number to get a visual line width and add a fudge factor to adjust the natural zeros. names={'No Disability' 'Mild Disability' 'ADL Only' 'CI Only' 'ADL & CI' 'Dead'} gr4=digraph(tp4, names) plot(gr4,'layout','circle','LineWidth',wt4 )

Now--to wipe out the zero lines I have drawn?

Answer 1

[Christine Tobler]

You can set the LineStyle property of these edges to 'none', which will make them not display.

 p = plot(gr4,'layout','circle','LineWidth',wt4);
 highlight(p, wt4==0.01, 'LineStyle', 'none');

[Lawrence Nitz]

Thanks for the assistance: Using a clean copy of this code:

% Take third power and Fake the missing edges PF3=primary * primary *primary+.01 LineW=PF3(:)*10 q=digraph(PF3) zz=plot(q, "LineWidth",LineW) labelnode(zz,[ 1 2 3 4 5 6],{'No Disability' 'Mild Disability' 'HIPAA ADL' 'HIPAA CI' ')HIPAA ADL & CI' 'Dead'}) %This works up to this point, then generates this error

highlight(zz,LineW==.01,'LineStyle','none') Then gives this error:

Error using matlab.graphics.chart.primitive.GraphPlot/highlight Expect NODES input to be a numeric vector, a character vector, a cell vector of character vectors, or a logical vector of length equal to the number of nodes.

Error in Test_line_hiding (line 25) highlight(zz,LineW==.01,'LineStyle','none')

I presume the equivalency test on the line weight should work on the whole vector. My inexperience may lead me astray.

[Kelly Kearney]

Minor syntax error in the suggested solution... to highlight edges, you need to provide the 'edges' input:

highlight(zz,'edges', LineW==.01,'LineStyle','none')