What is this? What generated the signal? It already looks like a baseline-corrected signal. I'm not sure you'd want to do anything to that signal.
s = load('ct8.mat')
x = s.x1;
y = s.y1;
plot(x, y, 'b-');
grid on;
figure;
s = load('ct8.mat');
x = s.x1;
y = s.y1;
subplot(2, 1, 1);
plot(x, y, 'b-');
grid on;
smoothy = sgolayfilt(y, 2, 151);
hold on;
plot(x, smoothy, 'r-', 'LineWidth', 2)
subplot(2, 1, 2);
yDiff = y - smoothy;
plot(x, yDiff, 'b-');
grid on;
If you were to subtract out the baseline, where would you put it? Can you attach a picture of the baseline drawn in red underneath the signal? By the way, I'm attaching some demos for you to adapt.
