linearleastsquarescurvefit

Moore-Penrose pseudoinverse

Linear least squares

var fit = require('linearleastsquarescurvefit');

// createFittingCurveUsingDataFromArrays(vectors, target, bounded, minValues, maxValues)
// by default bounded = false

console.log(fit.createFittingCurveUsingDataFromArrays(
[
[1, 1, 1, 1, 1, 1, 1],
[0, 1, 2, 3, 4, 5, 6],
[0, 1, 4, 9, 16, 25, 36],
[0, 1, 8, 27, 64, 125, 216]
],
[0, 1, 10, 100, 10, 1, 0]));

// Output: [-9.952380952380958,32.85714285714285,-5.476190476190406,-1.6653345369377348e-16]

// *

// createFittingCurveUsingFunctions(functions, x, y, bounded, minValues, maxValues)
// by default bounded = false

console.log(fit.createFittingCurveUsingFunctions(
[
function (x) { return 1; },
function (x) { return x; },
function (x) { return x * x; },
function (x) { return x x x; }
],
[0, 1, 2, 3, 4, 5, 6],
[0, 1, 10, 100, 10, 1, 0])
);

// Output: [-9.952380952380958,32.85714285714285,-5.476190476190406,-1.6653345369377348e-16]

console.log(fit.createFittingCurveUsingFunctions(
[
function (x) { return 1; },
function (x) { return x; },
function (x) { return x * x; },
function (x) { return Math.log(x) }],
[1, 2, 3, 4, 5, 6, 7, 8, 9],
[0, 1, 4, 10, 100, 118, 125, 129, 131])
);

// Output: [-142.23863430119385,155.2255477329857,-7.834175796848122,-222.95737398530258]

// *

// example_data.csv
// 0.00386592;0.006645011;0.011108997;0.018063013;0.028565501;0.043936934;0.065728529; ...
// 3.73E-06;8.46E-06;1.87E-05;4.01E-05;8.36E-05;0.000169857;0.000335463;0.00064438; ...
// 2.23E-10;6.69E-10;1.95E-09;5.53E-09;1.52E-08;4.08E-08;1.06E-07;2.70E-07;6.66E-07; ...
// 8.32E-16;3.29E-15;1.27E-14;4.74E-14;1.72E-13;6.10E-13;2.10E-12;7.03E-12;2.29E-11; ...
// 0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2;2; ...

// xxx; xxx; xxx; xxx; ... xxx <-
// yyy; yyy; yyy; yyy; ... yyy <-
// ... <- component data
// zzz; zzz; zzz; zzz; ... zzz <-
// ttt; ttt; ttt; ttt; ... ttt <- target vector

// createFittingCurveUsingDataFromCSVFile(
// dataPath,
// callback,
// bounded,
// minValue,
// maxValue,
// delimiterChar)
// by default bounded = false, delimiterChar = ';'

fit.createFittingCurveUsingDataFromCSVFile("example_data.csv",
function (result) {
console.log(result);
}, true, 0, 1, ';'
);

// Output: [0,1,1,0]

// *