partsankey interactive

This is the version of the partition tree with a sankey flavor and a little interactivity. See post.

Replicate in R

(function() {
library(htmltools)
library(d3r)
library(dplyr)

  titan_nest <<- as.data.frame(Titanic) %>%
  select(-Age) %>%
  group_by(Class, Sex, Survived) %>%
  summarise(Freq = sum(Freq)) %>%
  d3_nest(value_cols="Freq", root="Titanic")
})()

scr_part_tree <- function() {
  tags$script(HTML(
sprintf(
"
function initialize(hier) {
  d3.partition().size([height,width])(hier);

  var nodes = svg.selectAll('g.node')
    .data(hier.descendants().filter(function(d) {
      return d.height > 0;
    }));

  nodes = nodes.merge(
  nodes.enter().append('g')
    .attr('class','node')
  );

  nodes.attr('transform', function(d) {
    return 'translate(' + d.y0  + ',' + d.x0 + ')'
  });

  nodes.append('rect')
    .classed('rect-part', true);

  nodes.append('rect')
    .classed('rect-outline', true)
    .attr('width', function(d) { return d.y1 - d.y0; })
    .attr('height', function(d) { return d.x1 - d.x0; })
    .style('fill', 'none')
    .style('stroke', 'none');

  nodes.append('text')
    //.style('text-anchor','end')
    .attr('dy','0.5em')
    .text(function(d) { return d.data.name});

  return nodes;
}

function drawPartSankey(hier, nodes, nodeHeightRatio, duration, delay) {
  nodeHeightRatio = nodeHeightRatio ? nodeHeightRatio : 0.66;
  var nodeHeight = height * nodeHeightRatio;
  var nodeWidth = 10;

  // run treemap slice to get heights
  //  note, this will overwrite the x0,x1,y0,y1
  d3.treemap()
    .size([nodeWidth, nodeHeight])
    .tile(d3.treemapSlice)(hier);
  // record treemap heights and widths
  //  since partition will overwrite
  hier.each(function(d) {
    d.h = d.y1 - d.y0;
    d.w = d.x1 - d.x0;
  })

  hier.each(function(d) {
    // for the non-leaves also sum
    //  the categories at the leaf level
    //  in the case of Titanic data this will be survival
    if(d.height > 0) {
      var nest = d3.nest()
        .key(d=>d.data.name)
        .rollup(d=>{return d3.sum(d.map(dd=>dd.h))})
      d.sub = nest.entries(d.leaves())
    }
  });

  // now run partition with no size
  //  so will be in range [0,1]
  d3.partition()(hier);

  nodes.selectAll('rect.rect-outline')
    .transition()
    .duration(duration)
    .delay(delay)
    .style('stroke', 'gray')
    .style('fill', 'none')
    .style('stroke-dasharray','2,2');

  nodes.selectAll('rect.rect-part')
    .style('fill', function(d) {return color(d.data.name)})
    .style('stroke', 'white')
    .transition()
    .duration(duration)
    .delay(delay)
    .attr('y', function(d) {
      return ((d.x1-d.x0)*height-d.h)/2;
    })
    .attr('width', function(d) { return nodeWidth; })
    .attr('height', function(d) {
      return d.h;
    });

  nodes.selectAll('text')
    .attr('y', function(d) {
      if(d.height > 1) {
        return ((d.x1-d.x0)*height-d.h)/2;
      }
      return (d.x1-d.x0)*height/2;
    })
    .attr('x', function(d) {
      if(d.height > 1) {
        return nodeWidth / 2
      }
      return nodeWidth
    })
    .attr('dy', function(d) {
      if(d.height > 1) {
        return '-0.15em'
      }
      return '0.25em'
    })
    .style('text-anchor', function(d) {
      if(d.height > 1) {
        return 'middle'
      }
      return 'start'
    })

  function stack(x) {
    var xobj = {};
    var sum = d3.sum(x.children, function(d) {return d.h} )
    x.children.forEach(function(d) {
      d.sub.forEach(function(dd) {
        xobj[d.data.name + '~' + dd.key] = dd.value/sum;
      })
    })
    return d3.stack().keys(Object.keys(xobj))([xobj]);
  }

  function stackLeaf(x) {
    var xobj = {};
    var sum = d3.sum(x.children, function(d) {return d.h} );
    x.sub.forEach(function(d) {
      xobj[d.key] = d.value/sum;
    })
    return d3.stack().keys(Object.keys(xobj))([xobj]);
  }

  nodes.each(function(node) {
    if(node.height <= 1) {return}

    // empty array to store links on each node
    node.linkPaths = node.linkPaths ? node.linkPaths : [];

    var st = stack(node);
    st.forEach(function(d,i) {
      var childname = d.key.split('~')[0];
      var leafname = d.key.split('~')[1];
      var child = node.children.filter(function(ch) {
        return ch.data.name === childname
      })[0]
      var link = svg.append('path')
        .classed('link', true)
        .style('opacity', 0.000001);

      function customLine(pts) {
        var ld = d3.linkHorizontal()
          .source(function(d){return d[0]})
          .target(function(d){return d[1]})
          .x(function(d){return d[0]})
          .y(function(d){return d[1]});
        return [
          ld([pts[0],pts[1]]),
          pts[1] + ',' + pts[2],
          ld([pts[2],pts[3]]).slice(1)
        ].join('L');
      }

      var st2 = stackLeaf(child).filter(function(d) {
        return d.key === leafname
      })[0];

      link.datum({
        source: node,
        target: child,
        leaf: leafname
      })

      link.attr('d',customLine([
        [node.y0 * width + nodeWidth, ((node.x0 * height) + ((node.x1-node.x0)*height-node.h)/2 ) + d[0][0]*node.h],
        [child.y0 * width, ((child.x0 * height) + ((child.x1-child.x0)*height-child.h)/2 ) + st2[0][0]*child.h],
        [child.y0 * width, ((child.x0 * height) + ((child.x1-child.x0)*height-child.h)/2 ) + st2[0][1]*child.h],
        [node.y0 * width + nodeWidth, ((node.x0 * height) + ((node.x1-node.x0)*height-node.h)/2 ) + d[0][1]*node.h],
        //[node.y0 * width + nodeWidth, ((node.x0 * height) + ((node.x1-node.x0)*height-node.h)/2 )]
      ]));

      link
        .style('stroke', 'white')
        .style('fill', color(leafname));

      link
        .transition()
        .duration(500)
        .delay(duration+delay)
        .style('opacity', 0.5);

      node.linkPaths = node.linkPaths.concat(link.node());
    })
  });

  // add mouseover that highlights with higher opacity
  //  this will highlight all children with same leaf name
  svg.selectAll('.link').on('mouseover', function(d) {
    d3.select(this).style('opacity', 0.8)
    if(d.target.linkPaths) {
      d.target.linkPaths.forEach(function(lp) {
        var data = d3.select(lp).datum();
        if(data.leaf == d.leaf) {
          d3.select(lp).style('opacity', 0.8)
        }
      })
    }
  })

  svg.selectAll('.link').on('mouseout', function(d) {
    svg.selectAll('.link').style('opacity', 0.5)
  })
}

var tm = %s;

var tm_h = d3.hierarchy(tm)
  .sum(function(d){
    return d.Freq || 0;
  });

var width = 400;
var height = 400;

var svg = d3.select('#vis').append('svg')
  .style('width',width + 20 + 20)
  .style('height',height + 20 + 20)
  .append('g')
  .attr('transform','translate(20,20)');

var color = d3.scaleOrdinal(d3.schemeCategory10);
// rearrange so that survived yes is green
//  and no is red
color.range(
  [color.range()[2]]
    .concat([color.range()[3]])
    .concat(color.range().splice(0,2))
    .concat(color.range().splice(4,10))
)
color.domain(['Yes', 'No'])

var nodes = initialize(tm_h);

drawPartSankey(tm_h, nodes, 0.75, 100,0);
svg.selectAll('rect.rect-outline').remove();
//svg.selectAll('text').remove();
",
titan_nest
)
))
}


### create partition and partition tree ####
browsable(
  tagList(
    d3_dep_v4(offline=FALSE),
    tags$div(id="vis"),
    scr_part_tree()
  )
)

forked from timelyportfolio‘s block: partsankey static