D3.js interpolateRainbow() Function
The d3.interpolateRainbow() function is used to return a string of RGB color that corresponds to the d3.interpolateWarm in range 0 to 0.5 and d3.interpolateCool in range 0.5 to 1.0 both inclusive thus it forms the cyclic less-angry rainbow color scheme in d3.js.
Syntax:
d3.interpolateRainbow(t);
Parameters: This function accepts single parameter as mentioned above and described below:
- t: It is a numeric value that ranges in [0, 1].
Return Values: This function returns a string of RGB colors.
Below given are a few examples of the function given above.
Example 1:
HTML
<!DOCTYPE html>
< html lang = "en" >
< head >
< meta charset = "UTF-8" >
< meta name = "viewport" content =
"width=device-width, initial-scale=1.0" >
</ script >
< script src =
</ script >
< script src =
</ script >
< script src =
</ script >
</ head >
< body >
< script >
console.log(d3.interpolateRainbow(0.4));
console.log(d3.interpolateRainbow(0.3));
console.log(d3.interpolateRainbow(0.2));
console.log(d3.interpolateRainbow(0.5));
console.log(d3.interpolateRainbow(0.4));
console.log(d3.interpolateRainbow(0.9));
console.log(d3.interpolateRainbow(0.2));
console.log(d3.interpolateRainbow(0));
</ script >
</ body >
</ html >
|
Output:
rgb(226, 183, 47)
rgb(255, 120, 71)
rgb(254, 75, 131)
rgb(175, 240, 91)
rgb(226, 183, 47)
rgb(76, 110, 219)
rgb(254, 75, 131)
rgb(110, 64, 170)
Example 2:
HTML
<!DOCTYPE html>
< html lang = "en" >
< head >
< meta charset = "UTF-8" >
< meta name = "viewport" content =
"width=device-width, initial-scale=1.0" >
< style >
div {
padding: 6px;
text-align: center;
vertical-align: middle;
display: flex;
justify-content: center;
width: 90px;
height: 50px;
float: left;
}
</ style >
</ script >
</ script >
< script src =
</ script >
< script src =
</ script >
</ head >
< body >
< h2 >D3.interpolateRainbow() </ h2 >
< div class = "box1" >
< span ></ span >
</ div >
< div class = "box2" >
< span ></ span >
</ div >
< div class = "box3" >
< span ></ span >
</ div >
< div class = "box4" >
< span ></ span >
</ div >
< div class = "box5" >
< span ></ span >
</ div >
< script >
// Creating different colors for
// different Values of t is 0
let color1 =
d3.interpolateRainbow(0);
// Values of t is 0.1
let color2 =
d3.interpolateRainbow(0.1);
// Values of t is 0.3
let color3 =
d3.interpolateRainbow(0.3);
// Values of t is 0.5
let color4 =
d3.interpolateRainbow(0.5);
// Values of t is 0.8
let color5 =
d3.interpolateRainbow(0.8);
// 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");
// 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;
</ script >
</ body >
</ html >
|
Output:
Last Updated :
19 Aug, 2020
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