Package Exports
- interpolate-by-pravosleva
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Readme
Interpolate auxiliary fns
Install
npm install interpolate-by-pravoslevaAbout
Simple mathematics functions to interpolate operations.
Test
npm run testUsage
let interpolate = require('interpolate-by-pravosleva');or this way if necessary
import interpolate from 'interpolate-by-pravosleva';Linear interpolation example
console.log( interpolate.linear({ x:0.5, x1:0, y1:1, x2:1, y2:2 }) );
// 1.5This example description
|
y2= 2 | o
|
y= ? | o
(1.5 will be found in line by x value)
y1= 1 o
|
------------------------------------
x1= 0 x=0.5 x2= 1Bilinear interpolation example
console.log(
interpolate.bilinear ({
x: 3,
y: 3.5,
x1: 1,
y1: 1,
x2: 6,
y2: 5,
q11: 210,
q12: 590,
q21: 210,
q22: 590
})
);
// 362This example description
| q12= 590 q22= 590
y2= 5 | o o
|
| q= ? (362 will be found)
y= 3.5 | o
|
| q11= 210 q21= 210
y1= 1 | o o
------------------------------------
x1= 1 x=3 x2= 6And also, you can read more about bilinear interpolation on wiki.
Interpolate by table (only internal table values):
let temperature = -21.0,
percentage = 20.0,
dataObj = [
[0.0, -30, -20.0, -10.0, 0.0, 20.0, 40.0, 60.0, 80.0, 100.0],
[0.0, 4.19, 4.19, 4.19, 4.19, 4.19, 4.19, 4.19, 4.19, 4.19],
[25.0, 3.93000, 3.93000, 3.93, 3.95, 3.98, 4.00, 4.03, 4.05, 4.08],
[37.0, 3.68000, 3.68, 3.70000, 3.72, 3.77, 3.82, 3.88, 3.94, 4.00],
[45.0, 3.49000, 3.49, 3.52, 3.56, 3.62, 3.69, 3.76, 3.82, 3.89],
];
console.log(
interpolate.byInternalTable({
x: temperature,
y: percentage,
tableAsDoubleArray: dataObj
})
);
// 3.982MIT License
Copyright (c) 2017 Den Pol