This example courtesy of Displayr who have generously offered to sponsor a series of independently authored posts about interactive visualization with R and JavaScript. Thank you so much Displayr for this opportunity.
Below is the R source code for creating this visualization. You might notice that much of this is actually JavaScript. To see the JavaScript, please inspect index.html.
(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 <- function() {
tags$script(HTML(
sprintf(
"
function initialize(hier) {
d3.partition().size([height,width])(hier);
var nodes = svg.selectAll('g.node')
.data(hier.descendants());
nodes = nodes.merge(
nodes.enter().append('g')
.attr('class','node')
);
nodes.attr('transform', function(d) {
return 'translate(' + d.y0 + ',' + d.x0 + ')'
});
nodes.append('rect')
.classed('rect-part', true);
nodes.append('rect')
.classed('rect-outline', true)
.attr('width', function(d) { return d.y1 - d.y0; })
.attr('height', function(d) { return d.x1 - d.x0; })
.style('fill', 'none')
.style('stroke', 'none');
nodes.append('text')
//.style('text-anchor','end')
.attr('dy','1em')
.text(function(d) { return d.data.name});
return nodes;
}
function drawPart(hier, nodes, duration, delay) {
d3.partition().size([height,width])(hier);
svg.selectAll('.link')
.transition()
.duration(100)
.style('opacity', 0.00001)
.remove();
nodes.selectAll('rect.rect-part')
.transition()
.duration(duration)
.delay(delay)
.attr('width', function(d) { return d.y1 - d.y0; })
.attr('height', function(d) { return d.x1 - d.x0; })
.attr('x', 0)
.attr('y', 0)
.style('fill', function(d) { return color(d.data.name) || 'gray'; })
.style('stroke', 'white');
nodes.selectAll('rect.rect-outline')
.transition()
.duration(duration)
.delay(delay)
.style('stroke', 'white')
.style('fill', 'none')
.style('stroke-dasharray', null);
}
",
titan_nest
)
))
}
scr_part_tree <- function() {
tags$script(HTML(
sprintf(
"
function drawPartTree(hier, nodes, duration, delay) {
var nodeHeight = height * 0.66;
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;
});
// 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) || 'gray'; })
.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;
});
function stack(x) {
var xobj = {};
var sum = d3.sum(x.children, function(d) {return d.h} )
x.children.forEach(function(d) {
xobj[d.data.name] = d.h/sum;
})
return d3.stack().keys(Object.keys(xobj))([xobj]);
}
nodes.each(function(node) {
if(!node.children) {return}
var st = stack(node);
st.forEach(function(d,i) {
var child = node.children[i]
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');
}
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 )],
[child.y0 * width, ((child.x0 * height) + ((child.x1-child.x0)*height-child.h)/2 ) + 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(child.data.name));
link
.transition()
.duration(500)
.delay(duration+delay)
.style('opacity', 0.7);
})
});
}
var tm = %s;
var tm_h = d3.hierarchy(tm)
.sum(function(d){
return d.Freq || 0;
});
var width = 400;
var height = 400;
var convert_btn = d3.select('body').append('div')
.append('button')
.text('convert')
.attr('disabled', '')
.on('click', function(d) {
if(!svg.node().state) {return}
if(svg.node().state === 'partition') {
drawPartTree(tm_h, nodes, 2000, 0);
svg.node().state = 'partitionTree'
} else {
drawPart(tm_h, nodes, 2000, 0);
svg.node().state = 'partition'
}
})
var svg = d3.select('body').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);
var nodes = initialize(tm_h);
drawPartTree(tm_h, nodes, 0,0);
svg.selectAll('rect.rect-outline').remove();
svg.selectAll('text').remove();
convert_btn.attr('disabled', null);
svg.node().state = 'partitiontree'
",
titan_nest
)
))
}
### create partition and partition tree ####
browsable(
tagList(
d3_dep_v4(offline=FALSE),
scr_part(),
scr_part_tree()
)
)
forked from timelyportfolio‘s block: parttree on Titanic