I am currently drawing some arrows and would like them to have different/scaling stroke-widths (some being fatter than others)
I am currently using this code but the stroke width just won't change. If I hard code a value like 5 it does change to that.
I am using exactly the same scaling in another code but there I am scaling the heights of bars (no problems there).
Here is a fiddle of what I'm working with: https://fiddle.jshell.net/42jdw2Lt/
I would like to use the values in series that I marked as "num" to scale my strokewidth with.
<!DOCTYPE html>
<meta charset="utf-8">
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.2/d3.min.js">
</script>
<script src="http://d3js.org/topojson.v1.min.js"></script>
<script src="https://d3js.org/d3-selection-multi.v1.min.js"></script>
<script>
var svg = d3.select("body").append("svg")
.attr("width", 1500)
.attr("height", 1500);
var strwi = d3.scaleLinear()
.domain([100, 400])
.range([7,35])
var group = svg.append("g")
var series = [
[{"x": 360, "y": 250, "num": 100}, {"x": 520, "y": 400, "num":
100}, {"x": 630, "y": 300, "num": 100}],
[{"x": 71, "y": 45, "num": 200}, {"x": 32, "y": 39, "num":
200}, {"x": 43, "y": 70, "num": 200}],
[{"x": 100, "y": 300, "num": 300}, {"x": 200, "y": 200, "num":
300}, {"x": 300, "y": 200, "num": 300}], [{"x": 101, "y": 202,
"num": 400}, {"x": 102, "y": 204, "num": 400}, {"x": 103, "y":
215, "num": 400}]
];
var line = d3.line()
.curve(d3.curveBasis)
.x(function(d) { return d.x; })
.y(function(d) { return d.y; });
svg.append("svg:defs").append("svg:marker")
.attr("id", "triangle")
.attr("refX", 0)
.attr("refY", 5)
.attr("markerWidth", 14)
.attr("markerHeight", 14)
.attr("viewBox", "0 0 20 10")
.attr("orient", "auto")
.append("path")
.attr("d", "M 0,0 L 10,5 L 0,10 z")
.style("fill", "black");
group.selectAll(".line")
.data(series)
.enter().append("path")
.attr("class", "line")
.attr("stroke-width", function(d) {return strwi(d); })
.attr("stroke", "black")
.attr("fill", "none")
.attr("d", line)
.attr("marker-end", "url(#triangle)");
</script>
I just made a couple of changes to the code:
I set stroke-width and some other attibutes as styles
I used the first element of a series, and its num property, to compute the width
The code now looks like this, and has different thicknesses for each series
group.selectAll(".line")
.data(series)
.enter().append("path")
.attr("class", "line")
.style("stroke-width", function(d) {return strwi(d[0].num); })
.style("stroke", "black")
.style("fill", "none")
.attr("d", line)
.attr("marker-end", "url(#triangle)");
Related
I have an SVG clipPath made of multiple path elements, which I need to apply to a group of elements. I only want to clip out the area under the path stroke itself, not in between the paths. (example that doesn't do what I want follows)
var lineData = [ { "x": 1, "y": 5}, { "x": 100, "y": 400},
{ "x": 300, "y": 100}, { "x": 600, "y": 600},
{ "x": 700, "y": 50} ];
var lineData2 = [ { "x": 1, "y": 500}, { "x": 100, "y": 100},
{ "x": 300, "y": 700}, { "x": 600, "y": 60},
{ "x": 700, "y": 700} ];
var lineFunction = d3.line()
.x(function(d) { return d.x; })
.y(function(d) { return d.y; })
.curve(d3.curveBundle);
var svg = d3.select('body')
.append('svg')
.attr('id', 'svg')
.attr('width', 660)
.attr('height', 660)
.style('outline', '1px solid red')
.append('g')
.attr('clip-path', 'url(#clippy)');
var polygon = svg.append('polygon')
.attr('points', '230 10, 660 330, 230 650')
.attr('fill', '#c99');
var circle = svg.append('circle')
.attr('cx', 230)
.attr('cy', 330)
.attr('r', 200)
.attr('fill', '#9c6')
var clippy = d3.select('#svg')
.append('defs')
.append('clipPath')
.attr('id', 'clippy');
clippy.append("path")
.attr("d", lineFunction(lineData))
.attr("stroke", "blue")
.attr("stroke-width", 18)
.attr("fill", "none");
clippy.append("path")
.attr("d", lineFunction(lineData2))
.attr("stroke", "blue")
.attr("stroke-width", 18)
.attr("fill", "none");
Basically I want to accomplish something similar to what you get using letters, but instead using lines/paths.
var lineData = [ { "x": 1, "y": 5}, { "x": 100, "y": 400},
{ "x": 300, "y": 100}, { "x": 600, "y": 600},
{ "x": 700, "y": 50} ];
var lineData2 = [ { "x": 1, "y": 500}, { "x": 100, "y": 100},
{ "x": 300, "y": 700}, { "x": 600, "y": 60},
{ "x": 700, "y": 700} ];
var lineFunction = d3.line()
.x(function(d) { return d.x; })
.y(function(d) { return d.y; })
.curve(d3.curveBundle);
var svg = d3.select('body')
.append('svg')
.attr('id', 'svg')
.attr('width', 660)
.attr('height', 660)
.style('outline', '1px solid red')
.append('g')
.attr('clip-path', 'url(#clippy)');
var polygon = svg.append('polygon')
.attr('points', '230 10, 660 330, 230 650')
.attr('fill', '#c99');
var circle = svg.append('circle')
.attr('cx', 230)
.attr('cy', 330)
.attr('r', 200)
.attr('fill', '#9c6')
var clippy = d3.select('#svg')
.append('defs')
.append('clipPath')
.attr('id', 'clippy');
clippy.append('text')
.attr('x', 120)
.attr('y', 320)
.attr('font-size', '4em')
.attr('font-weight', 'bold')
.attr('font-family', 'Georgia')
.text('This is a clip');
clippy.append('text')
.attr('x', 120)
.attr('y', 420)
.attr('font-size', '4em')
.attr('font-weight', 'bold')
.attr('font-family', 'Georgia')
.text('Also a clip')
Please help!
EDIT: Here's a Codepen with both examples.
From my reading of the SVG spec, it's not possible to use only a <path>'s stroke as the clipping path:
The raw geometry of each child element exclusive of rendering properties such as ‘fill’, ‘stroke’, ‘stroke-width’ within a ‘clipPath’ conceptually defines a 1-bit mask (with the possible exception of anti-aliasing along the edge of the geometry) which represents the silhouette of the graphics associated with that element. Anything outside the outline of the object is masked out.
However, converting the <clipPath> to a <mask> element produces what I think is your desired effect.
Here's a forked CodePen to demonstrate — the paths have have their strokes set to white, and the <text> elements were also given a fill of white to match the clip-path effect.
hey guys i am currently trying to change the visibility of 4 lines depending on whether the slider position is at the same "year-tick" as i have in my data.
for example: i would want line 3 which has the value "1994" stored to only be visible as long as the slider is on position "1994"
i havent workder with sliders yet, which is why i am having this much trouble getting this to work.
here is a fiddle of my code: https://fiddle.jshell.net/42jdw2Lt/3/
<!DOCTYPE html>
<meta charset="utf-8">
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.2/d3.min.js">
</script>
<script src="http://d3js.org/topojson.v1.min.js"></script>
<script src="https://d3js.org/d3-selection-multi.v1.min.js"></script>
<script>
var width = 1500;
var height = 1500;
var margin = {top: 50, left: 50, right: 50, bottom:50},
height = 650-margin.top-margin.bottom,
width = 1200-margin.left-margin.right;
var svg = d3.select("body").append("svg")
.attr("width", width+margin.left+margin.right)
.attr("height", height+margin.top+margin.bottom)
.append("g")
.attr("transform", "translate("+margin.left+","+margin.top+")")
var strwi = d3.scaleLinear()
.domain([100, 400])
.range([7,35])
var group = svg.append("g")
var series = [
[{"x": 360, "y": 250, "num": 100}, {"x": 520, "y": 400, "num": 100}, {"x":
630, "y": 300, "num": 100, "year": 1991}],
[{"x": 71, "y": 45, "num": 200}, {"x": 32, "y": 39, "num": 200}, {"x": 43,
"y": 70, "num": 200, "year": 1992}],
[{"x": 100, "y": 300, "num": 300}, {"x": 200, "y": 200, "num": 300}, {"x":
300, "y": 200, "num": 300, "year": 1994}],
[{"x": 101, "y": 202, "num": 400}, {"x": 102, "y": 204, "num": 400}, {"x":
103, "y": 215, "num": 400, "year": 1995}]
];
var line = d3.line()
.curve(d3.curveBasis)
.x(function(d) { return d.x; })
.y(function(d) { return d.y; });
group.selectAll(".line")
.data(series)
.enter().append("path")
.attr("class", "line")
// .attr("visibility", "hidden")
.attr("stroke-width", function(d) {return strwi(d); })
.attr("stroke", "black")
.attr("fill", "none")
.attr("d", line);
var data = [1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
2000, 2001, 2002]
var x = d3.scaleLinear()
.domain(d3.extent(data))
.range([0, width])
.clamp(true);
var slider = svg.append("g")
.attr("class", "slider")
.attr("transform", "translate(" + 0 + "," + 300 + ")");
slider.append("line")
.attr("class", "track")
.attr("x1", x.range()[0])
.attr("x2", x.range()[1])
.attr("stroke", "black")
.attr("stroke-width", "4")
.select(function() { return
this.parentNode.appendChild(this.cloneNode(true)); })
.attr("class", "track-inset")
.select(function() { return
this.parentNode.appendChild(this.cloneNode(true)); })
.attr("class", "track-overlay")
.call(d3.drag()
.on("start.interrupt", function() { slider.interrupt(); })
.on("start drag", function() { hue(x.invert(d3.event.x));
}));
slider.insert("g", ".track-overlay")
.attr("class", "ticks")
.selectAll("ticks")
.data(x.ticks(data.length))
.enter().append("text")
.attr("x", x)
.attr("text-anchor", "middle")
.attr("transform", "translate(0," + 30 + ")")
.text(function(d) { return d; })
.exit()
.data(x.ticks(data.length * 2))
.enter().append("circle")
.attr("cx", x)
.attr("r", 3)
.attr("fill", "#c1c7cd");
slider.insert("g", ".track-overlay")
.attr("class", "ticks--cirlces")
.selectAll("ticks--ticks");
var handle = slider.insert("circle", ".track-overlay")
.attr("class", "handle")
.attr("r", 9);
slider.transition() // Gratuitous intro!
.duration(750)
.tween("hue", function() {
var i = d3.interpolate(0, 70);
return function(t) { hue(i(t)); };
});
function hue(h) {
handle.attr("cx", x(h));
d3.select(".text")
.text( (Math.round(h*2)/2).toFixed(1) );
}
</script>
I added the prop year to all your elements in the data selecting all the line paths in a variable called paths so that I can change the opacity when you move your slider like this
var paths = group.selectAll(".line")
.data(series)
.enter().append("path")
.attr("class", "line")
// .attr("visibility", "hidden")
.attr("stroke-width", function(d) {
return strwi(d);
})
.attr("stroke", "black")
.attr("fill", "none")
.attr("d", line);
and then in your hue function, I added this code to change the opacity based on your slider
paths.attr('opacity', function(d) {
if (((Math.round(h * 2) / 2).toFixed(1)) > d[2]['year']) {
return 0;
} else {
return 1;
}
})
Here's a fiddle for you:
var width = 1500;
var height = 1500;
var margin = {
top: 50,
left: 50,
right: 50,
bottom: 50
},
height = 650 - margin.top - margin.bottom,
width = 1200 - margin.left - margin.right;
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")")
var strwi = d3.scaleLinear()
.domain([100, 400])
.range([7, 35])
var group = svg.append("g")
var series = [
[{
"x": 360,
"y": 250,
"num": 100,
"startYear": 1991,
"endYear": 1995
}, {
"x": 520,
"y": 400,
"num": 100,
"startYear": 1991,
"endYear": 1995
}, {
"x": 630,
"y": 300,
"num": 100,
"startYear": 1991,
"endYear": 1995
}],
[{
"x": 71,
"y": 45,
"num": 200,
"startYear": 1992,
"endYear": 1993
}, {
"x": 32,
"y": 39,
"num": 200,
"startYear": 1992,
"endYear": 1993
}, {
"x": 43,
"y": 70,
"num": 200,
"startYear": 1992,
"endYear": 1993
}],
[{
"x": 100,
"y": 300,
"num": 300,
"startYear": 1994,
"endYear": 1996
}, {
"x": 200,
"y": 200,
"num": 300,
"startYear": 1994,
"endYear": 1996
}, {
"x": 300,
"y": 200,
"num": 300,
"startYear": 1994,
"endYear": 1996
}],
[{
"x": 101,
"y": 202,
"num": 400,
"startYear": 1995,
"endYear": 1997
}, {
"x": 102,
"y": 204,
"num": 400,
"startYear": 1995,
"endYear": 1997
}, {
"x": 103,
"y": 215,
"num": 400,
"startYear": 1995,
"endYear": 1997
}]
];
var line = d3.line()
.curve(d3.curveBasis)
.x(function(d) {
return d.x;
})
.y(function(d) {
return d.y;
});
var paths = group.selectAll(".line")
.data(series)
.enter().append("path")
.attr("class", "line")
.attr('v1',function(d){
return d[2]['startYear'];
})
.attr('v2',function(d) {
return d[2]['endYear'];
})
.attr('opacity',0)
//.attr("visibility", "hidden")
.attr("stroke-width", function(d) {
return strwi(d);
})
.attr("stroke", "black")
.attr("fill", "none")
.attr("d", line);
var data = [1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002]
var x = d3.scaleLinear()
.domain(d3.extent(data))
.range([0, width])
.clamp(true);
var slider = svg.append("g")
.attr("class", "slider")
.attr("transform", "translate(" + 0 + "," + 300 + ")");
slider.insert("g", ".track-overlay")
.attr("class", "ticks")
.selectAll("ticks")
.data(x.ticks(data.length))
.enter().append("text")
.attr("x", x)
.attr("text-anchor", "middle")
.attr("transform", "translate(0," + 30 + ")")
.text(function(d) {
return d;
})
.exit()
.data(x.ticks(data.length * 2))
.enter().append("circle")
.attr("cx", x)
.attr("r", 3)
.attr("fill", "#c1c7cd");
slider.append("line")
.attr("class", "track")
.attr("x1", x.range()[0])
.attr("x2", x.range()[1])
.attr("stroke", "black")
.attr("stroke-width", "4")
.select(function() {
return this.parentNode.appendChild(this.cloneNode(true));
})
.attr("class", "track-inset")
.select(function() {
return this.parentNode.appendChild(this.cloneNode(true));
})
.attr("class", "track-overlay")
.call(d3.drag()
.on("start.interrupt", function() {
slider.interrupt();
})
.on("start drag", function() {
//console.log(d3.event.x)
hue(x.invert(d3.event.x));
}));
slider.insert("g", ".track-overlay")
.attr("class", "ticks--cirlces")
.selectAll("ticks--ticks");
var handle = slider.insert("circle", ".track-overlay")
.attr("class", "handle")
.attr("r", 9);
slider.transition() // Gratuitous intro!
.duration(750)
.tween("hue", function() {
var i = d3.interpolate(0, 70);
return function(t) {
//nsole.log(t)
hue(i(t));
};
});
function hue(h) {
handle.attr("cx", x(h));
d3.select(".text")
.text((Math.round(h * 2) / 2).toFixed(1));
paths
.transition().duration(300)
.attr('opacity', function(d) {
if (((Math.round(h * 2) / 2).toFixed(1)) >= d[2]['startYear'] && ((Math.round(h * 2) / 2).toFixed(1)) <= d[2]['endYear']) {
return 1;
} else {
return 0;
}
})
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.2/d3.min.js"></script>
<script src="https://d3js.org/topojson.v1.min.js"></script>
<script src="https://d3js.org/d3-selection-multi.v1.min.js"></script>
Let me know if this is what you wanted or there's something else.
There must be something obvious I'm missing here.
I'm trying to draw a simple line and this is my javascript:
// CRASH DATA
var lineData = [
{ "x": 0, "y": 0.5},
{ "x": 2, "y": 0.1},
{ "x": 4, "y": -0.5},
{ "x": 6, "y": -0.8},
{ "x": 8, "y": -0.9},
{ "x": 10, "y": -0.10},
{ "x": 12, "y": -0.10},
{ "x": 14, "y": -0.11},
{ "x": 16, "y": -0.10},
{ "x": 18, "y": -0.9},
{ "x": 20, "y": -0.7},
{ "x": 22, "y": -0.6},
{ "x": 24, "y": -0.5},
{ "x": 26, "y": -0.3},
{ "x": 28, "y": -0.1},
{ "x": 30, "y": 0.2},
{ "x": 32, "y": 0.4},
{ "x": 34, "y": 0.8},
{ "x": 36, "y": 0.8},
{ "x": 38, "y": 0.7},
{ "x": 40, "y": 0.4},
{ "x": 42, "y": 0.4},
{ "x": 44, "y": 0.4},
{ "x": 46, "y": 0.2},
{ "x": 48, "y": 0.1},
{ "x": 50, "y": 0}
];
//DRAW TRAJECTORY
function draw(data){
var margin = {top: 30, right: 20, bottom: 30, left: 50},
width = 600 - margin.left - margin.right,
height = 270 - margin.top - margin.bottom;
var x = d3.scale.linear().range([0, width]);
var y = d3.scale.linear().range([height, 0]);
var xAxis = d3.svg.axis().scale(x)
.orient("bottom").ticks(5);
var yAxis = d3.svg.axis().scale(y)
.orient("left").ticks(5);
//This is the accessor function we talked about above
var lineFunction = d3.svg.line()
.x(function(d) { return d.x; })
.y(function(d) { return d.y; })
.interpolate("linear");
var svg = d3.select("body")
.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
// Scale the range of the data
x.domain(d3.extent(data, function(d) { return d.x; }));
y.domain(d3.extent(data, function(d) { return d.y; }));
svg.append("g") // Add the X Axis
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g") // Add the Y Axis
.attr("class", "y axis")
.call(yAxis);
svg.append("path") // Add the lineFunction path.
.attr("class", "line")
.attr("d", lineFunction(data));
};
//PUT EVERYTHING ON SCREEN
$( document ).ready(function() {
draw(lineData);
});
And here is the outcome:
You aren't actually using the scales you define. Your line function should be
var lineFunction = d3.svg.line()
.x(function(d) { return x(d.x); })
.y(function(d) { return y(d.y); })
.interpolate("linear");
Complete example here.
I would like to get the coordinates of a point on a line by clicking on the line using the following code:
var lineData = [ { "x": 1, "y": 5}, { "x": 20, "y": 20},
{ "x": 40, "y": 10}, { "x": 60, "y": 40},
{ "x": 80, "y": 5}, { "x": 100, "y": 60}];
var lineFunction = d3.svg.line()
.x(function(d) { return d.x; })
.y(function(d) { return d.y; })
.interpolate("linear");
var svgContainer = d3.select("body").append("svg")
.attr("width", 200)
.attr("height", 200);
var lineGraph = svgContainer.append("path")
.data([lineData]).attr("d", lineFunction)
//.attr("d", lineFunction(lineData))
.attr("stroke", "blue")
.attr("stroke-width", 2)
.attr("fill", "none")
.on('mousedown', function(d) {
console.log({"x":d.x, "y":d.y})
});
(I updated the code to address the comments, but I still get "Object {x: undefined, y: undefined}")
I keep getting an "undefined" when clicking on the line. Am I missing a step?
You can get the coordinates of an event using d3.event:
.on("mousedown", function() {
console.log({"x": d3.event.x, "y": d3.event.y});
});
use mouse event
.on('mousedown', function(d) {
var m = d3.mouse(this);
console.log("x:"+m[0]+" y:"+m[1]);
});
in your function m[0] and m[1] gives you X and Y.
I have been searching for quite a while but I haven't been able to figure it out.
I want to have a transition between two interpolations "basis" and "step-after" for a single line.
var time_scale, kpi_scale;
var line;
var data = [
{"kpi": 100, "time": 1317448800000},
{"kpi": 200, "time": 1320127200000},
{"kpi": 250, "time": 1322719200000},
{"kpi": 180, "time": 1325397600000},
{"kpi": 230, "time": 1328076000000},
{"kpi": 360, "time": 1330581600000},
{"kpi": 140, "time": 1333260000000},
{"kpi": 120, "time": 1335852000000},
{"kpi": 240, "time": 1338530400000},
{"kpi": 190, "time": 1341122400000},
{"kpi": 185, "time": 1343800800000},
{"kpi": 130, "time": 1346479200000},
{"kpi": 340, "time": 1349071200000},
{"kpi": 320, "time": 1351749600000},
{"kpi": 250, "time": 1354341600000}
];
// set up the viewport, the scales, and axis generators
var container_dimensions = {width: 900, height: 400},
margins = {top: 10, right: 20, bottom: 30, left: 60},
chart_dimensions = {
width: container_dimensions.width - margins.left - margins.right,
height: container_dimensions.height - margins.top - margins.bottom
};
var time_extent = d3.extent(
data,
function(d){return d.time;}
);
time_scale = d3.time.scale()
.domain(time_extent)
.range([0, chart_dimensions.width]);
var kpi_extent = d3.extent(
data,
function(d){return d.kpi;}
);
kpi_scale = d3.scale.linear()
.domain(kpi_extent)
.range([chart_dimensions.height, 0]);
var container = d3.select('body')
.append('svg')
.attr("width", container_dimensions.width)
.attr("height", container_dimensions.height)
.append("g")
.attr("transform", "translate(" + margins.left + "," + margins.top + ")")
.attr("id","chart");
draw_timeseries (data);
transitionToStepped (data);
function draw_timeseries (data) {
line = d3.svg.line()
.x(function(d){return time_scale(d.time);})
.y(function(d){return kpi_scale(d.kpi);})
.interpolate("basis");
d3.select('#chart').append('path')
.attr('d', line(data))
.attr('id', 'line')
.attr('class', 'line');
}
function transitionToStepped (data) {
line.interpolate("step-after");
d3.select("#chart").selectAll(".line")
.transition()
.duration(2000)
.attr("d", line(data))
.delay(2000);
}
I have saved a small jsfiddle containing my code.
jsFiddle Interpolation Transition
I wanted to "morph" between the basis line and the step-after line. But d3 is sliding in the step-after line from the left instead of "bending" the basis line into a step-after one.
Thanks for your help.
Christoph
There has got to be a way to do this, and certainly one better than the offering below (I am looking forward to seeing other answers), but I have seen no answers here as of yet, and this will at least do a "morph" for you, although it also makes the line parallel to the x-axis during the transition. Not a terrible thing, but I believe not precisely what you are after.
Here's a fiddle for the full code and demo,
modified from your original:
http://jsfiddle.net/n5P6z/2/
The meat of the approach is here:
function xLineReduce() {
line.x(function (d) {
return time_scale(d.time);
}).y(function (d) {
return chart_dimensions.height;
});
}
function resetInterpolator() {
line.interpolate("cubic-in-out");
}
function stepItUp() {
line.x(function (d, i) {
return time_scale(d.time);
})
.y(function (d, i) {
return kpi_scale(d.kpi);
})
.interpolate("step-after");
}
function transitionToStepped(myData) {
path.data(myData)
.call(xLineReduce)
.transition()
.delay(1000)
.duration(500)
.attr('d', line(myData));
path.data(myData)
.call(resetInterpolator)
.transition()
.delay(1500)
.duration(0)
.attr('d', line(myData));
path.data(myData)
.call(stepItUp)
.transition()
.delay(1500)
.duration(500)
.attr('d', line(myData));
}