How to plot and calculate 95% confidence interval

Question

Sara 2018-11-30

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https://ww2.mathworks.cn/matlabcentral/answers/432987-how-to-plot-and-calculate-95-confidence-interval

评论： Sara 2018-12-10

95% confidence interval.png

Hello,

I have two vectors of the actual values and predicted values and I want to calculate and plot 95% confidenence interval just like the image I have attached. Colud you please help me?

thanks a lot.

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Answer 1

Rishabh Gupta 2018-12-10

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https://ww2.mathworks.cn/matlabcentral/answers/432987-how-to-plot-and-calculate-95-confidence-interval#answer_351415

Hi Sara,

To calculate the 95% confidence intervals of your signal, you first will need to calculate the mean and *|std| (standard deviation) of your experiments at each value of your independent variable. The standard way to do this is to calculate the standard error of the mean at each value of your independent variable, multiply it by the calculated 95% values of the t-distribution (here), then add and subtract those values from the mean.

Please refer to following MATLAB Answer for more details:

https://www.mathworks.com/matlabcentral/answers/414039-plot-confidence-interval-of-a-signal?s_tid=answers_rc1-2_p2_MLT

I hope this helps.