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42 changes: 42 additions & 0 deletions src/com/stuypulse/stuylib/math/Regression/LinearRegression.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,42 @@
package com.stuypulse.stuylib.math.Regression;

import com.stuypulse.stuylib.math.Vector2D;

// sum of x
public class LinearRegression {

public Vector2D[] points;

public LinearRegression(Vector2D... points){
this.points = points;
}

private Vector2D equation(){
double sumX = 0;
double sumY = 0;
double sumXX = 0;
double sumXY = 0;

for(Vector2D point : points) {
sumX += point.x;
sumY += point.y;
sumXX += Math.pow(point.x, 2);
sumXY += point.x * point.y;

}

double intercept = (sumY * sumXX - sumX * sumXY) / (sumXX - Math.pow(sumX, 2));
double slope = (points.length * sumXY - sumX * sumY) / (points.length * sumXX - Math.pow(sumX,2));

return new Vector2D(slope, intercept);
}

public void addRefPoint(double x, double y){

}

public double predictedValue(double x){
return equation().x * x + equation().y;
}

}
38 changes: 26 additions & 12 deletions src/com/stuypulse/stuylib/util/plot/Playground.java
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Expand Up @@ -5,6 +5,7 @@
package com.stuypulse.stuylib.util.plot;

import com.stuypulse.stuylib.math.Vector2D;
import com.stuypulse.stuylib.math.Regression.LinearRegression;
import com.stuypulse.stuylib.math.interpolation.*;
import com.stuypulse.stuylib.streams.*;
import com.stuypulse.stuylib.streams.angles.AFuser;
Expand Down Expand Up @@ -34,11 +35,11 @@ public interface Constants {
int WIDTH = 800;
int HEIGHT = 600;

double MIN_X = -1.0;
double MAX_X = 1.0;
double MIN_X = 0.0;
double MAX_X = 10.0;

double MIN_Y = -1.0;
double MAX_Y = 1.0;
double MIN_Y = 0.0;
double MAX_Y = 10.0;

Settings SETTINGS =
new Settings()
Expand Down Expand Up @@ -69,6 +70,11 @@ public static Series make(String id, BStream series) {
}

public static void main(String[] args) throws InterruptedException {





Plot plot = new Plot(Constants.SETTINGS);

VStream m = VStream.create(() -> plot.getMouse().sub(new Vector2D(0.5, 0.5)).mul(2));
Expand All @@ -95,14 +101,22 @@ public static void main(String[] args) throws InterruptedException {
VStream delay = VStream.create(() -> delay_angle.get().getVector().mul(1.1));
VStream afuser = VStream.create(() -> afuser_angle.get().getVector().mul(1.05));

plot.addSeries(Constants.make("Angle", mouse))
.addSeries(Constants.make("Jerk", jerk))
.addSeries(Constants.make("Rate", rate))
.addSeries(Constants.make("LPF", lpf))
.addSeries(Constants.make("HPF", hpf))
.addSeries(Constants.make("afuser", afuser))
.addSeries(Constants.make("delayed", delay))
.addSeries(Constants.make("mouse", m));
Vector2D[] refPoints = {new Vector2D(1,2), new Vector2D(2,5), new Vector2D(6, 10)};
LinearRegression LinearRegression = new LinearRegression(refPoints);
plot.addSeries(new FuncSeries(
new Config("linear regression", 1000),
new Domain(0, 10),
x -> LinearRegression.predictedValue(x)
));

// plot.addSeries(Constants.make("Angle", mouse))
// .addSeries(Constants.make("Jerk", jerk))
// .addSeries(Constants.make("Rate", rate))
// .addSeries(Constants.make("LPF", lpf))
// .addSeries(Constants.make("HPF", hpf))
// .addSeries(Constants.make("afuser", afuser))
// .addSeries(Constants.make("delayed", delay))
// .addSeries(Constants.make("mouse", m));
//
// .addSeries(Constants.make("y=x", x -> x))
// .addSeries(
Expand Down