95% confidence intervalsof regression line!

Hi! How can I calculate the 95% confidence intervals(numerically) of a regression line after using the the command regress?

Answer 1

[Star Strider]

I like regress, even with its limitations. However, it would probably be best for you to re-run your regression with the fitlm (link) function, then use the predict (link) function to calculate the confidence intervals. The ‘Xnew’ in the documentation are your existing independent variable values.

[Panos Ale]

I know it's has been a while ,I used the fitlim and predict and everything is ok!I know it's has been a while but can you also clarify to how can I calculate the 95% CI of the slope as two numbers(upper and lower) because I want to plot them two error bars. I hope I make myself understandable. thanks for the help anyway :)

[Star Strider]

The regress function will calculate the parameter confidence limits. You can then plot them any way you like.

As I mentioned in my original Answer, use fitlm and predict to calculate the confidence intervals on the regression line.

[Panos Ale]

Clear and helpful as always!Thank you very much!

[Star Strider]

As always, my pleasure!