MATLAB: I dont know how to plot more than one regressions in one plot, like the picture i did in excel. I tried basic fitting tool but could not success, and i have look at multiple regression but could not understand becaus of no example. Thank for any he

multiple regressionregression

Best Answer

Something like this should work:
x = 1:10;
y1 = rand(1, 10);
y2 = rand(1, 10);
DM = [x', ones(length(x),1)];                       % Design Matrix
B1 = DM \ y1';                                      % Estimate Parameters Of ‘y1’ Fit
B2 = DM \ y2';                                      % Estimate Parameters Of ‘y2’ Fit
y1_fit = DM*B1;                                     % Calculate Fit For ‘y1’
y2_fit = DM*B2;                                     % Calculate Fit For ‘y2’
figure(1)
plot(x, y1, '.b',  x, y2, '.r')                     % Plot Data
hold on
plot(x, y1_fit, '--b',  x, y2_fit, '--r')           % Plot Fitted Regression Lines
hold off
grid
Related Question