Fill command issue for time series

I am trying to fill the space in between two lines on a time series

I have created a 45x1 cell array of datenum variables (X), a 45x1 cell array for the blue line (Y1) and a 45x1 cell array for the red line (Y2)

The plot of these two lines can be seen in the attatched image 'Lines'

I want to fill in the space in between these lines

However, when I use the following script, the space in between the lines does not fill - as seen in the image 'Fill'. What am I doing incorrectly?

EDIT: I have attached some sample data, Y1 is the higher values

>> plot(X, Y1, 'b', X, Y2, 'r')
>> hold on
>> fill([X fliplr(X)],[Y1 fliplr(Y2)],'c')

Answer 1

[Les Beckham]

Based on your sample data, you need to make a simple change to your code. Since your vectors are columns, you need to concatenate using a semicolon so you get vectors and not nx2 matrices.

Here is the result after making this change:

plot(x, y1, 'b', x, y2, 'r')
hold on
fill([x; flip(x)], [y1; flip(y2)], 'c', 'edgecolor', 'none')

Answer 2

[Prabhanjan Mentla]

In general fill function is used to fill the polygons with specified color( c ).

x = 1:5;
y1 = sin(x) + 2;
y2 = sin(x);
fill([x fliplr(x)], [y2 fliplr(y1)], 'c')

This code fills the area between y1 and y2.

Plot followed by hold on and fill, may also work in the same way as above code.

Here in your case I assume there is a problem with your input data.

Refer the below link.

https://www.mathworks.com/matlabcentral/answers/47897-fill-problem-shading-the-wrong-parts-of-a-curve?s_tid=answers_rc1-2_p2_MLT

[William Garrett]

Thank you for your help; however one thing confuses me.

On the attatched link the answer says to sort your data as if walking around the x.y co-ordinates. Are you able to expand on what this means?

I have attached to the question some sample data if this helps, Y1 is the higher values

Thank you