% Extract Common Spatial Pattern (CSP) Feature

close all; clear; clc;

load dataset_BCIcomp1.mat

EEGSignals.x=x_train;

EEGSignals.y=y_train;

Y=y_train;

classLabels = unique(EEGSignals.y); 

CSPMatrix = learnCSP(EEGSignals,classLabels);

nbFilterPairs = 1;

X = extractCSP(EEGSignals, CSPMatrix, nbFilterPairs);  

EEGSignals.x=x_test;

T = extractCSP(EEGSignals, CSPMatrix, nbFilterPairs);  

save dataCSP.mat X Y T

color_L = [0 102 255] ./ 255;

color_R = [255, 0, 102] ./ 255;

pos = find(Y==1);

plot(X(pos,1),X(pos,2),'x','Color',color_L,'LineWidth',2);

hold on

pos = find(Y==2);

plot(X(pos,1),X(pos,2),'o','Color',color_R,'LineWidth',2);

legend('Left Hand','Right Hand')

xlabel('C3','fontweight','bold')

ylabel('C4','fontweight','bold')