Forum Discussion
d3 Line graph dual y-axis
since the data is confidential, i am unable to post the powerbi file, etc. if there is any other example of a dual y-axis line graph, using d3, i would be happy to use it instead of the code above..
What verison of d3 do you use? Can you share pbiviz.json, package.json and tsconfig.json?
Ignat Vilesov,
Software Engineer
Microsoft Power BI Custom Visuals
- sriksrin8 years agoFrequent Visitor
Hi, I am also facing the same problem. I am using the custom visual D3JSVisuals and embedding the D3 code into it.
I get to see that the lines always start from the same point and not from the previous point. Can't figure where mistake is going on.
Request your help in the same.
D3 Version : V3
Custom Visual: D3JSVisual
D3 Code: http://bl.ocks.org/d3noob/e34791a32a54e015f57d
PBI Code :
var margin = {top: 30, right: 40, bottom: 30, left: 50}, width = pbi.width - margin.left - margin.right, height = pbi.height - margin.top - margin.bottom; var parseDate = d3.time.format("%d-%b-%y").parse; var x = d3.time.scale().range([0, width]); var y0 = d3.scale.linear().range([height, 0]); var y1 = d3.scale.linear().range([height, 0]); var xAxis = d3.svg.axis().scale(x) .orient("bottom").ticks(5); var yAxisLeft = d3.svg.axis().scale(y0) .orient("left").ticks(5); var yAxisRight = d3.svg.axis().scale(y1) .orient("right").ticks(5); /*var valueline = d3.svg.line() .x(function(d) { return d.date; }) .y(function(d) { return d.close; }) .interpolate("linear"); */ var valueline = d3.svg.line() .x(function(d) { return x(d.date); }) .y(function(d) { return y0(d.close); }) .interpolate("cardinal"); var valueline2 = d3.svg.line() .x(function(d) { return x(d.date); }) .y(function(d) { return y1(d.open); }); var svgCont = d3.select("#chart") .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 + ")"); // Get the data pbi.dsv(function(data) { data.forEach(function(d) { d.date = parseDate(d.date); d.close = +d.close; d.open = +d.open; }); // Scale the range of the data x.domain(d3.extent(data, function(d) { return d.date; })); y0.domain([0, d3.max(data, function(d) { return Math.max(d.close); })]); y1.domain([0, d3.max(data, function(d) { return Math.max(d.open); })]); svgCont.append("path") // Add the valueline path. .attr("class","line") .attr("d", valueline(data)); /*svg.append("path") // Add the valueline2 path. .style("stroke", "red") .attr("d", valueline2(data));*/ svgCont.append("g") // Add the X Axis .attr("class", "x axis") .attr("transform", "translate(0," + height + ")") .call(xAxis); svgCont.append("g") .attr("class", "y axis") .style("fill", "steelblue") .call(yAxisLeft); svgCont.append("g") .attr("class", "y axis") .attr("transform", "translate(" + width + " ,0)") .style("fill", "red") .call(yAxisRight); });- v-viig8 years agoCommunity Champion
jppp Can you help with this issue? It seems devs use D3.JS visual.
Ignat Vilesov,
Software Engineer
Microsoft Power BI Custom Visuals
- jppp8 years agoContinued Contributor
I managed to get the code working and basically the trick is in how the data is presented to and used by D3js.
In this case the date column: I have kept it as a string, e.g. '26-Mar-18' and add a derived column, convert as a date type and use that for the 'sort-by' column.After that the line d3.time.format("%d-%b-%y").parse; will correctly parse the column to dates that can be used by the d3js axis.
If you need some more explanation; I got a PBIX file that I can share if needed.
-JP