upper and lower curves

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yasmine ayed 2019-9-12

回答： Matt J 2019-9-12

I uesed the basic fitting to get the 5th polynominal curve (median) .

I want to add the upper with 25% from the median and lower with 25% from median curves.

Matt J 2019-9-12

You can use the quantile command

to determine the upper and lower quartiles at each time points and then use those points to plot the upper and lower curves.

MATLAB Mathematics Elementary Math Polynomials

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