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D3.js log.rangeRound() Function

 3 years ago
source link: https://www.geeksforgeeks.org/d3-js-log-rangeround-function/
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D3.js log.rangeRound() Function

Last Updated: 23-08-2020

The log.rangeRound() function is used to set the range of the scale to the specified array of values along with this it internally sets the interpolator to interpolatorRound.

Syntax:

log.rangeRound([range]);

Parameters: This function takes a single parameter that is given above and described below.

  • [range]: An array that contains the range for the specified domain.

Return Value: This function does not return any value.

Example 1:

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" path1tent=
"width=device-width,initial-scale=1.0" />
</script>
</head>
<body>
<h2 style="color:green">GeekforGeeks</h2>
<p>log.rangeRound() Function</p>
<script>
var log = d3.scaleLog()
// Domain
.domain([1, 10])
// Range for the domain
.rangeRound([10, 20, 30, 40, 50, 60, 70, 80, 90]);
document.write("<h3>log(1.0): " + log(1.0) + "</h3>");
document.write("<h3>log(2.5): " + log(2.5) + "</h3>");
document.write("<h3>log(4): " + log(4) + "</h3>");
document.write("<h3>log(4.5): " + log(4.5) + "</h3>");
document.write("<h3>log(1.5): " + log(1.5) + "</h3>");
</script>
</body>
</html>

Output:

gfgcr332.PNG

Example 2:

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" path1tent="width=device-width, 
initial-scale=1.0" />
</script>
</head>
<body>
<h2 style="color:green">GeekforGeeks</h2>
<p>log.rangeRound() Function</p>
<script>
var log = d3.scaleLog()
// Domain
.domain([1, 10])
// Range for the domain
.rangeRound([0, 960]);
document.write("<br/><div style=float:left;>");
document.write("<p> With rangeRound()</p>");
document.write("<h3>" + log(1.5) + "</h3>");
document.write("<h3>" + log(2.5) + "</h3>");
document.write("<h3>" + log(3.5) + "</h3>");
document.write("<h3>" + log(4.5) + "</h3>");
document.write("<h3>" + log(8.5) + "</h3>");
document.write(
"<h3>" + log(10.5) + "</h3></div>");
var log = d3.scaleLog()
// Domain
.domain([1, 10])
// Range for the domain
.range([0, 960]);
document.write(
"<div style=margin-left:10px;float:left;>");
document.write("<p> Without rangeRound()</p>");
document.write("<h3>" + log(1.5) + "</h3>");
document.write("<h3>" + log(2.5) + "</h3>");
document.write("<h3>" + log(3.5) + "</h3>");
document.write("<h3>" + log(4.5) + "</h3>");
document.write("<h3>" + log(8.5) + "</h3>");
document.write(
"<h3>" + log(10.5) + "</h3></div>");
</script>
</body>
</html>

Output:

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