Create confidence interval for linear regression line

Hi, how can I plot a confidence interval bound for the regresison line using lsline? The code I wrote is this:

clc, clear all, close all
X(:,1) = (1:1:100);
X(:,2) = rand(100,1);
figure;
hold on
plot(X(:,1),X(:,2),'b*','MarkerSize',5);
h = lsline;
set(h,'color','g','LineWidth',3)
%s = lsline + 0.95 * h;
title 'TRY';
xlabel 'X'; 
ylabel 'Y'; 
hold off

Thank you

Answer 1

[Star Strider]

I would use the fitlm (link) function to calculate the regression line, the the predict function to calculate the confidence intervals. If you want to use polyfit and polyval instead, you can use the File Exchange contribution polypredci.