shaded confidence interval plotting with shade area (patch)

Hello,

I'm trying to plot the shadow area between the confidence interval with the line in the middle. I've tried a few approaches, but each time I'm getting the same results (plot image). I've attached a data and code below. Please help, I don't know why I have this problem. I've read similar tags, and tried to adhere to the solutions, but it seems that doesn't work for my case.

% Using Matlab - calculations of confidence interval

pd = fitdist(X,'Normal')

ci = paramci(pd)

a4=ci(1,1)/pd.mu;

b4=ci(2,1)/pd.mu;

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

x=X.*a4;

y=X.*b4;

Ymax=y;

Ymin=x;

figure

plot(time,Ymax)

hold on

plot(time,Ymin)

line([time(end) time(end)],[Ymin(end),Ymax(end)])

line([time(2) time(2)],[Ymin(1),Ymax(1)])

patch([time fliplr(time)], [Ymax fliplr(Ymin)], 'g')

Answer 1

[Star Strider]

The data in ‘data-confidence interval.xls’ are read in as column vectors, so fliplr simply flips a column vector, and accomplishes nothing. It is necessary to vertically concatenate the vectors with their flipped versons.

Try this instead:

patch([time; flipud(time)], [Ymax; flipud(Ymin)], 'g')

producing:

.