I'm trying to convert the line graph to bar, I'm having trouble understanding where I'm making the error. I'm using d3.js v4.
This line of code displays code that works for line area:
var area = d3.area()
.x(function(d) { return time_scale(d['timestamp'])+6.5; })
.y0(-80+width -max_y)
.y1(function(d) { return measure_scale(+d[field]); })
.curve(d3.curveStep)
;
// append a SVG path that corresponds to the line chart
d3.select('#chart').append("path")
.datum(neigh_data)
.attr("class", "area")
.attr("d", area)
.attr('transform', 'translate(' + margin + ', -15)')
;
This line of code does not work for bars (it looks like the height of the rectangle is not correct, and I'm not using the color fill):
d3.select('#chart').selectAll(".bar").append("path")
.datum(neigh_data)
.enter().append("rect")
.attr("class", "bar")
.attr("x", function(d) { return time_scale(d['timestamp']); })
.attr("y", function(d,i) { return measure_scale(+d[field]); })
.attr("width", time_scale.bandwidth())
.attr("height", function (d,i) { return height - measure_scale(+d[field]); })
;
I'm really messing around with something.
Related
I have created a interactive legend, that works 100% perfectly fine. I just didnt manage to duplicate it for another column of my dataframe.
It starts with bubbles I'm plotting with the code below. Then I draw the actual legend.
1. creating bubbles
selection
.selectAll('circle')
.data(cities)
//.attr('r', 14)
.attr('r', function(d) {
return Math.max(Math.pow(d.population, 0.57) / 40, 7);})
.attr('cx', function(d) { return projection.latLngToLayerPoint([d.latitude, d.longitude]).x;
})
.attr('cy', function(d) { return projection.latLngToLayerPoint([d.latitude, d.longitude]).y;
})
.attr("class", function(d) { return "bubbles " + d[attribute] }) //Important feature for legend
//.attr("class", function(d) { return "bubbles " + d.category })
.attr('stroke', 'white')
.attr('stroke-width', function(d) {
return 1.2 / projection.scale;})
.style("fill", function(d) {
return color(d[attribute])})
.attr("stroke", "#FFFF")
.attr("stroke-width", 1)
.attr("fill-opacity", .9)
.on("mouseover", showTooltip)
.on("mousemove", moveTooltip)
.on("mouseleave", hideTooltip)
2. Drawing actual legend
svg_chorop.selectAll("mydots")
.data(allgroups)
.enter()
.append("rect")
.attr("x", 0)
.attr("y", function(d, i) {
return 60 + i * (size + 10)
}) // 60 is where the first dot appears. 10 is the distance between dots
.attr("width", size)
.attr("height", size)
.style("fill", function(d) {
return mycolor(d)
})
.style("stroke", "#DCDCDC")
.on("mouseover", highlight)
.on("mouseleave", noHighlight)
My goal : make the exact same legend with another hovering option.
Problem : I can't find a way to ADD another class attribute (in my case d.category, for economic sector) in the first bunch of code.
Fiddle link, so it's easier for you to see the code : jsfiddle
I have simply tried to add another .attr("class",..). It doesn't work. And I can find a similar fix for this problem online.
.attr("class", function(d) { return "bubbles " + d[attribute] }) //Important feature for legend
//.attr("class", function(d) { return "bubbles " + d.category })
Here you can see the two legends, left one functionnal, right, the
one to be implemented
Here you can see the dataframe and the category column
Im trying to add a 'highlight' effect that is shown in this link(https://www.d3-graph-gallery.com/graph/parallel_custom.html) My lines are made up of two things, first is the line itself, and the second are dots that appear on each line. When my mouse hovers on the red line, the line stays the same but the red dots disapear for some reason. I want the red dots along with the red line to stay the same when i hover over it. What am i doing wrong here? the picture below shows what happens when i hover over the red line, and as you can see the red dots disappear
// Highlight individual line and dots
var highlight = function(d) {
var selected_line = d.key
// first every group turns grey
svgObj.selectAll(".line")
.transition().duration(200)
.style("stroke", "lightgrey")
.style("opacity", "0.2")
svgObj.selectAll(".dot")
.transition().duration(200)
.style("stroke", "lightgrey")
.style("opacity", "0.2")
// Second the hovered line takes its color
svgObj.selectAll("." + selected_line)
.transition().duration(200)
.style("stroke", color(selected_line))
.style("opacity", "1")
svgObj.selectAll("." + selected_line)
.transition().duration(200)
.style("stroke", color(selected_line))
.style("opacity", "1")
}
// UnHighlight
var doNotHighlight = function(d) {
svgObj.selectAll(".line")
.transition().duration(200).delay(50)
.style("stroke", function(d){ return( color(d.key))})
.style("opacity", "1")
}
// Draw the line
svgObj.selectAll(".line")
.data(sumstat)
.enter()
.append("path")
.attr("class", function (d) { return "line " + d.key} ) // 2 class for each line: 'line' and the group name
.attr("fill", "none")
.attr("stroke", function(d){ return color(d.key) })
.attr("stroke-width", 4.5)
.attr("d", function(d){
return d3.line()
.curve(d3.curveMonotoneX)
.x(function(d) { return x(d.year); })
.y(function(d) { return y(+d.n); })
(d.values)
})
//.on("mouseover", function(){return tooltip.style("visibility", "visible");})
//.on("mousemove", function(){return tooltip.style("top", (d3.event.pageY-10)+"px").style("left",(d3.event.pageX+10)+"px");})
//.on("mouseout", function(){return tooltip.style("visibility", "hidden");})
.on("mouseover", highlight)
.on("mouseleave", doNotHighlight )
// Draw dots on points
svgObj.selectAll(".dot")
.data(data)
.enter()
.append("circle")
.attr("class", function (d) { return "dot " + d.key } ) // 2 class for each line: 'line' and the group name
.style("fill","white")
.style("stroke-width", "3px")
.style("stroke", function (d) { return color(d.name) })
.attr("cx", function(d) {return x(d.year); })
.attr("cy", function(d) {return y(d.n); })
.attr("r", 5.5)
It is because the data of .line and .dot is different, one is sumstat with key property, the other one is data without key. so the code
.append("circle")
.attr("class", function (d) { return "dot " + d.key } )
will return "dot undefined" for each circle's class.
And then in highlight() the selected dots will not be included.
I adjusted your code into a demo, but you might change the bind data of .line and .dot consistently, to avoid such mistake after.
I was trying to add labels to circles that are constantly moving in D3. One of the ways I found was to insert the label and the circle to a g tag. However, this causes errors whenever I want to EXIT the elements and merge them (which is not happening right now).
Is there any other way to do it? My graph right now seems to be with lower frames per second because it is not using the merge to update from the current x/y position to the new one.
The code is as follow:
var t = d3.transition()
.duration(0);
// JOIN new data with old elements.
var circles = g.append("g").selectAll('g')
.data(data.values)
.enter()
.append('g')
// EXIT elements
d3.selectAll("circle").transition()
.attr("class", "exit")
.remove();
// EXIT elements
d3.selectAll(".label")
.attr("class", "exit")
.remove();
// ENTER new elements present in new data.
// Circles
circles.append("circle")
.attr("class", "enter")
.attr("fill", function (d) { return color(d.country); })
.attr("cy", function (d) { return y(d.active_cases); })
.attr("cx", function (d) { return x(d.total_deaths) })
.merge(circles)
.transition(t)
.attr("r", 15)
// Labels
circles.append("text")
.attr("class", "label")
.attr("font-size", 10)
.style("text-anchor", "middle")
.style("fill", "white")
.attr("x", function (d) { return x(d.total_deaths) })
.attr("y", function (d) { return 3 + y(d.active_cases) })
.merge(circles)
.text(function (d) { return d.country })
I built this line graph with d3js: jsfiddle
Example Data:
{
date: '18-May-18',
close: 281755783529,
volume: 11792035643,
notes: null
}
How can I use the "volume" value from data to plot a rectangle bar corresponding to each date? The line graph with volume bars would look something like this:
Thank you!
Because the volume uses a different Y-range you need to define a new yScale for that
var yVolume = d3.scaleLinear().range([height, 0]);
yVolume.domain([0, d3.max(data, function(d) { return d.volume; })]);
Draw a right axis for this scale
var yAxisVol = d3.axisRight(yVolume).ticks(10);
svg.append("g")
.attr("class", "yaxisVol")
.attr("transform", `translate(${width},0)`)
.call(yAxisVol);
Then draw the rect on the correct location
svg.append("g").attr("class", "barsVol")
.selectAll("rect")
.data(data)
.enter()
.append("rect")
.attr("fill", "yellow")
.attr("x", function(d) { return x(new Date(d.date.getTime()-11*60*60*1000)); })
.attr("y", function(d) { return yVolume(d.volume); })
.attr("height", function(d) { return height - yVolume(d.volume); })
.attr("width", function(d) {
return x(new Date(d.date.getTime()+11*60*60*1000)) -
x(new Date(d.date.getTime()-11*60*60*1000)); });
The rectangles have a width of 1 "day" (22 hours).
Add a clip rectangle to the barsVol group or extend the x-domain with a day on the left and right.
script type="text/javascript">
d3.csv("mydata.csv", function(data){
var svgcontainer = d3.select("body").append("svg")
.attr("width",500)
.attr("height",500)
svgcontainer.selectAll("rect")
.data(data)
.enter()
.append("rect")
.attr("width" ,function (d) { return d.age * 10;})
.attr("height" ,45)
.attr("y",function(d,i) { return i*50; })
.attr("fill","blue")
svgcontainer.selectAll("text")
.data(data)
.enter()
.append("text")
.attr("fill","white")
//.attr("y",function(d,i) { return i*50 ; })
.text( function (d) { return d.name; })
})
I have to append text in my d3.js code but it's not displaying text.I am new to d3.js so please any one help me. Here is my code-
From the first observation i will get to know the issue related with the text element position in svg. In SVG Coordinate positions are very important to achieve the graphical representation. In above code snippet x and y positions are missing. sample code below:-
svgcontainer.append("text")
.attr("x", function(d) { return x(d.value) - 3; })
.attr("y", barHeight / 2)
.attr("dy", ".35em")
.text(function(d) { return d.value; });
Example