Create confidence interval for linear regression line

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Andrea Bedin
Andrea Bedin 2019-6-26
回答： Star Strider 2019-6-26
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

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采纳的回答

Star Strider
Star Strider 2019-6-26
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.

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