Package Exports

interpolate-by-pravosleva

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Readme

Interpolate auxiliary fns

Install

npm install interpolate-by-pravosleva

Usage

let interpolate = require('interpolate-by-pravosleva');

Line interpolation example

console.log( interpolate.linear({ x:0.5, x1:0, y1:1, x2:1, y2:2 }) );
// 1.5

Bilinear 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
  })
);
// 362

This example description:

          |   q12= 590                q22= 590
y2= 5     |   o                       o
          |
          |           q= ? (362 will found)
y= 3.5    |           o
          |
          |   q11= 210                q21= 210
y1= 1     |   o                       o
          ------------------------------------
              x1= 1   x=3             x2= 6

And 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
  })
);
// 3.982

interpolate-by-pravosleva

Package Exports

Readme

Interpolate auxiliary fns

Install

Usage

MIT License