Hello there, I know a lot of answers exist for shading the confidence interval between two curves on a plot. However, I am unable to generate it for this data.

I tried a few options from the previous answers

like fill, plotUnc, patch but I only get a very fine

black/grey curves at the upper and lower limits.

I have a mean curve, upper limit curve and

lower limit curve data. I want to show the mean

curve and just shade the area in the confidence

interval without lines.

E.g. the below code gives this :

load('data_ques2.mat')

%X2 = [X, fliplr(X)];
inBetween = [YU, fliplr(YL)];
figure()
patch([X fliplr(X)], [YU  fliplr(YL)],'g', 'FaceAlpha',0.5); 
%fill(X2, inBetween, 'g');
hold on;
plot(X, YM, 'r', 'LineWidth', 2);

But i would like this:

Could you please help me figure out what am I doing wrong here? Thanks in advance!

TWT

Answer 1

[Walter Roberson]

Your last YU value is NaN. patch() and fill() can only draw a face when all of the coordinates for the face are finite.

[T]

Thanks Walter! Silly of me.