This is an example of how to create a fitted curve with confidence bounds in MATLAB®.
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% Load the data for x, y, and yfit load fitdata x y yfit; % Create a scatter plot of the original x and y data figure; scatter(x, y, 'k'); % Plot the fit of the y data line(x, yfit, 'color', 'k', 'linestyle', '-', 'linewidth', 2); % Plot the confidence bounds line(x, yfit + 0.3, 'color', 'r', 'linestyle', '--', 'linewidth', 2); line(x, yfit - 0.3, 'color', 'r', 'linestyle', '--', 'linewidth', 2); % Add a legend and axis labels legend('Data', 'Localized Regression', 'Confidence Intervals', 2); xlabel('X'); ylabel('Noisy');
