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position edge labels using cytoscape.js


position edge labels using cytoscape.js

By : Ugur Kilic
Date : November 17 2020, 11:55 AM
hop of those help? You may be interested in label autorotation for edges, planned for 2.4 and implemented in unstable. As for the logic you'd like in the layout itself, it may be a too tight coupling of implied rendering behaviour to the layout. Whereas things like node.outerHeight() can be taken into consideration directly and explicitly in layouts, this would rely on the layout assuming certain rendering behaviour.
I think there's a factor option for spacing the nodes farther apart in the breadthfirst layout, and if you want to discuss other new ideas like it I would be happy to discuss it in a ticket in the tracker.
code :


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setting the start position of the edge from node in cytoscape.js

setting the start position of the edge from node in cytoscape.js


By : juliajing72
Date : March 29 2020, 07:55 AM
With these it helps That's a point of discussion. For feature requests, please use the issue tracker:
See https://github.com/cytoscape/cytoscape.js/issues/783
cytoscape doesn't display edge labels and attributes for GraphML file?

cytoscape doesn't display edge labels and attributes for GraphML file?


By : seanfahey21
Date : March 29 2020, 07:55 AM
will be helpful for those in need By default, Cytoscape doesn't show edge labels. To show them, go to the Edge tab in the Style panel and create a passthrough mapping from the desired edge column to the Label.
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Cytoscape.js, position label text on top of edge

Cytoscape.js, position label text on top of edge


By : prakruti
Date : March 29 2020, 07:55 AM
wish of those help You can add classes to labels when initializing the cytoscape stylesheet:
code :
var cy = (window.cy = cytoscape({
  container: document.getElementById("cy"),

  boxSelectionEnabled: false,
  autounselectify: true,

  style: [{
      selector: "node",
      css: {
        "label": "data(label)",
        "text-valign": "center",
        "text-halign": "center",
        "height": "60px",
        "width": "60px"
      }
    },
    {
      selector: "edge",
      css: {
        "target-arrow-shape": "triangle"
      }
    },
    {
      selector: "edge[label]",
      css: {
        "label": "data(label)",
        "text-rotation": "autorotate",
        "text-margin-x": "0px",
        "text-margin-y": "0px"
      }
    },
    {
      selector: ".background",
      css: {
        "text-background-opacity": 1,
        "color": "#fff",
        "text-background-color": "#000"
      }
    },
    {
      selector: ".outline",
      css: {
        "color": "#fff",
        "text-outline-color": "#000",
        "text-outline-width": 3
      }
    },
    {
      selector: ".top-center",
      style: {
        "text-valign": "top",
        "text-halign": "center"
      }
    }
  ],
  elements: {
    nodes: [{
        data: {
          id: '1',
          label: 'outline'
        },
        classes: 'outline'
      },
      {
        data: {
          id: '2',
          label: 'background'
        },
        classes: 'background'
      },
      {
        data: {
          id: '3',
          label: 'top-center'
        },
        classes: 'top-center'
      },
      {
        data: {
          id: '4',
          label: 'none'
        }
      }
    ],
    edges: [{
        data: {
          source: "1",
          target: "2",
          label: "outline"
        },
        classes: "outline"
      },
      {
        data: {
          source: "2",
          target: "3",
          label: "background"
        },
        classes: "background"
      },
      {
        data: {
          source: "3",
          target: "4",
          label: "top-center"
        },
        classes: "top-center"
      },
      {
        data: {
          source: "4",
          target: "1",
          label: "none"
        }
      }
    ]
  },
  layout: {
    name: "circle"
  }
}));

cy.ready(function() {
  cy.layout({
    name: "circle"
  }).run();
});
body {
  font: 14px helvetica neue, helvetica, arial, sans-serif;
}

#cy {
  height: 100%;
  width: 75%;
  position: absolute;
  left: 0;
  top: 0;
  float: left;
}
<html>

<head>
  <meta charset=utf-8 />
  <meta name="viewport" content="user-scalable=no, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, minimal-ui">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/cytoscape/3.2.17/cytoscape.min.js"></script>
  <script src="https://unpkg.com/jquery@3.3.1/dist/jquery.js"></script>
</head>

<body>
  <div id="cy"></div>
</body>

</html>
Position edge labels on igraph plot in R

Position edge labels on igraph plot in R


By : samedaypaydayloanssc
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , You have to specify for each label the y-coordinate, i.e. edge.label.y = c(0.6, 0.2, -0.5) . I changed your code a little bit so you can see which label is which, i.e. association <- c("A", "B", "C")
The complete code:
code :
library(igraph)

ego <- c("Stability (high)", "Stability (high)", "Stability (high)")
alter <- c("Status", "Depressive symptoms", "Anxiety Symptoms")
association <- c("A", "B", "C")


nodes <- c("Stability (high)", "Status", "Depressive symptoms", "Anxiety Symptoms")
x <- c(-5, 5, 5, 5)
y <- c(4, 8, 4, 0)

edges <- as.data.frame(cbind(ego, alter, association))
nodes <- cbind.data.frame(nodes, x, y)

nodes$x <- as.numeric(nodes$x)
nodes$y <- as.numeric(nodes$y)


study1 <- graph_from_data_frame(edges, nodes, directed = TRUE)

E(study1)$color <- "red"

plot(study1, layout=as.matrix(nodes[,c("x","y")]),
     vertex.size = 75,
     vertex.color = "gray",
     vertex.label.color = "black",
     vertex.label.family = "Arial",
     vertex.label.cex = 0.7,
     edge.arrow.size = 0.7,
     edge.width = 3.5,
     edge.color = E(study1)$color,
     edge.label = E(study1)$association,
     edge.label.y = c(0.6, 0.2, -0.5), # specify the y-coordinate for each label
     edge.label.cex = 3,
     edge.label.color = "black")
Position Edge labels using iGraph

Position Edge labels using iGraph


By : user5404461
Date : March 29 2020, 07:55 AM
help you fix your problem Unfortunately the part of the code that proposes a position for the label of the edge does not take the curvature of the edge into account - it assumes that the edge is a straight line. You can either patch the function above, or try appending and prepending spaces to the edge labels.
(If you happen to come up with a patch that takes edge curvature into account, please send us a pull request).
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