La función d3.interpolateRdYlGn() en D3.js se usa para devolver el color correspondiente del esquema de color divergente de RdYlGn, donde Rd es rojo, Yl es amarillo y Gn es verde.
Sintaxis:
d3.interpolateRdYlGn(t)
Parámetros: esta función acepta un solo parámetro como se mencionó anteriormente y se describe a continuación:
- t: Es cualquier número en el rango de 0 a 1.
Valores devueltos: esta función devuelve una string de color RGB.
Los siguientes ejemplos ilustran la función D3.js interpolateRdYlGn() en JavaScript:
Ejemplo 1:
HTML
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0"/> <title>D3.js interpolateRdYlGn() Function</title> </head> <style></style> <body> <!--Fetching from CDN of D3.js --> <script src= "https://d3js.org/d3.v4.min.js"> </script> <script src= "https://d3js.org/d3-color.v1.min.js"> </script> <script src= "https://d3js.org/d3-interpolate.v1.min.js"> </script> <script src= "https://d3js.org/d3-scale-chromatic.v1.min.js"> </script> <script> console.log(d3.interpolateRdYlGn(0)); console.log(d3.interpolateRdYlGn(0.12)); console.log(d3.interpolateRdYlGn(0.24)); console.log(d3.interpolateRdYlGn(0.354)); console.log(d3.interpolateRdYlGn(0.45)); console.log(d3.interpolateRdYlGn(0.52)); console.log(d3.interpolateRdYlGn(0.61)); console.log(d3.interpolateRdYlGn(0.74)); console.log(d3.interpolateRdYlGn(0.8)); console.log(d3.interpolateRdYlGn(0.92)); console.log(d3.interpolateRdYlGn(1.0)); </script> </body> </html>
Producción:
Ejemplo 2:
HTML
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta
name="viewport"
content="width=device-width,
initial-scale=1.0"/>
<title>D3.js interpolateRdYlGn() Function</title>
</head>
<style>
div {
padding: 5px;
text-align: center;
vertical-align: middle;
display: flex;
justify-content: center;
width: fit-content;
height: 50px;
float: left;
}
</style>
<body>
<h2>D3.interpolateRdYlGn()</h2>
<div class="box1">
<span>
(0.1)
</span>
</div>
<div class="box2">
<span>
(0.2)
</span>
</div>
<div class="box3">
<span>
(0.3)
</span>
</div>
<div class="box4">
<span>
(0.4)
</span>
</div>
<div class="box5">
<span>
(0.5)
</span>
</div>
<div class="b6">
<span>
(0.6)
</span>
</div>
<div class="b7">
<span>
(0.7)
</span>
</div>
<div class="b8">
<span>
(0.8)
</span>
</div>
<div class="b9">
<span>
(0.9)
</span>
</div>
<div class="b10">
<span style="color: honeydew;">
(1.0)
</span>
</div>
<!--Fetching from CDN of D3.js -->
<script src=
"https://d3js.org/d3.v4.min.js">
</script>
<script src=
"https://d3js.org/d3-color.v1.min.js">
</script>
<script src=
"https://d3js.org/d3-interpolate.v1.min.js">
</script>
<script src=
"https://d3js.org/d3-scale-chromatic.v1.min.js">
</script>
<script>
// Creating different colors for different
// Values of t as 0.1,0.2... 1.0
let color1 = d3.interpolateRdYlGn(0.1);
let color2 = d3.interpolateRdYlGn(0.2);
let color3 = d3.interpolateRdYlGn(0.3);
let color4 = d3.interpolateRdYlGn(0.4);
let color5 = d3.interpolateRdYlGn(0.5);
let color6 = d3.interpolateRdYlGn(0.6);
let color7 = d3.interpolateRdYlGn(0.7);
let color8 = d3.interpolateRdYlGn(0.8);
let color9 = d3.interpolateRdYlGn(0.9);
let color10 = d3.interpolateRdYlGn(1.0);
// Selecting Div using query selector
let box1 = document.querySelector(".box1");
let box2 = document.querySelector(".box2");
let box3 = document.querySelector(".box3");
let box4 = document.querySelector(".box4");
let box5 = document.querySelector(".box5");
let b6 = document.querySelector(".b6");
let b7 = document.querySelector(".b7");
let b8 = document.querySelector(".b8");
let b9 = document.querySelector(".b9");
let b10 = document.querySelector(".b10");
// Setting style and BG color of the particular DIVs
box1.style.backgroundColor = color1;
box2.style.backgroundColor = color2;
box3.style.backgroundColor = color3;
box4.style.backgroundColor = color4;
box5.style.backgroundColor = color5;
b6.style.backgroundColor = color6;
b7.style.backgroundColor = color7;
b8.style.backgroundColor = color8;
b9.style.backgroundColor = color9;
b10.style.backgroundColor = color10;
</script>
</body>
</html>
Producción:
