plot standard deviation as a shaded area

Hey,

I have a vector containing the mean values and a another vector with the standard deviations. I want to plot the standard deviation as a shaded area and the mean as a line as shown on the image below but I want to write my own function. hope someone can help

[M]

I want to write my own function

Does this mean you do not want to use built-in function like fill or area ?

You can start by reading this discussion:

https://mathworks.com/matlabcentral/answers/180829-shade-area-between-graphs

[Hinna Ahmed]

I want to use built-in functions like fill or area but not functions like stdshade because they use a matrix with all the observations as a input but i have already calculated the mean and std.

Answer 1

[M]

You can use the code directly from this answer:

https://mathworks.com/matlabcentral/answers/180829-shade-area-between-graphs#answer_169649

y = rand(1,10); % your mean vector;
x = 1:numel(y);
std_dev = 1;
curve1 = y + std_dev;
curve2 = y - std_dev;
x2 = [x, fliplr(x)];
inBetween = [curve1, fliplr(curve2)];
fill(x2, inBetween, 'g');
hold on;
plot(x, y, 'r', 'LineWidth', 2);