How to re-render an svg in d3.js?

@kadin 

To re-render an SVG in d3.js, you can follow these steps:

1. Select the SVG element you want to re-render or create a new one using d3.select() method. For example:

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var svg = d3.select("#mySvg");

1. Remove any existing elements from the SVG. This can be done using the .remove() or .selectAll().remove() method. For example:

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svg.selectAll("*").remove();

1. Update your data or make any required changes to the dataset you want to visualize.
2. Re-create the elements based on the updated dataset using d3 methods such as .selectAll(), .data(), .enter(), .append(), etc. For example:

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var data = [10, 20, 30, 40];

var rects = svg.selectAll("rect")
  .data(data)
  .enter()
  .append("rect")
  .attr("x", function(d, i) { return i * 50; })
  .attr("y", function(d) { return 100 - d; })
  .attr("width", 40)
  .attr("height", function(d) { return d; });

1. If you want to update or animate existing elements, you can use d3 transition methods such as .transition(), .delay(), .duration(), etc. For example:

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rects.transition()
  .duration(1000)
  .attr("x", function(d, i) { return i * 50; })
  .attr("y", function(d) { return 100 - d; })
  .attr("height", function(d) { return d; });

By following these steps, you can re-render an SVG in d3.js with updated data or changes.