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Fill light gray color between two horizontal lines in a plot?

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I want to fill light gray color between two horizontal lines such that I can plot the horizontal lines as dashed dotted ? Please help me regarding this issue. I am writing below the code
x=[1:10];
y=[1:10];
figure(1);clf;
plot(x,y,'b')
hold on
plot([1,10],2*[1,1],'--.k')
hold on
plot([1,10],4*[1,1],'--.k')

Accepted Answer

Star Strider
Star Strider on 7 Feb 2023
To plot a ‘dash-dot¹ line requires a slightly different LineStyle definition —
x=[1:10];
y=[1:10];
figure(1)
plot(x,y,'b')
hold on
patch([x, flip(x)], [ones(size(x))*2, ones(size(x))*4], [1 1 1]*0.05, 'Edgecolor','none', 'FaceAlpha',0.25)
plot([1,10],2*[1,1],'-.k')
plot([1,10],4*[1,1],'-.k')
hold off
Plotting the patch as dash-dotted is difficult, however it is possible.
.
  3 Comments
Afiq Azaibi
Afiq Azaibi on 17 Mar 2023
In addition to Star Strider's solution, starting in R2023a you can use the xregion and yregion functions:
plot(1:10);
yregion(2, 5, 'EdgeColor', 'black');
You can update the LineStyle, FaceAlpha, and other visuals about the object. However, the default EdgeColor is 'none'.

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More Answers (2)

Arif Hoq
Arif Hoq on 7 Feb 2023
x=[1:10];
y=[1:10];
figure(1);clf;
plot(x,y,'b')
hold on
plot([1,10],2*[1,1],'--.k')
hold on
plot([1,10],4*[1,1],'--.k')
x = [1 10 10 1];
y = [2 2 4 4];
patch(x,y,[.5 .5 .5])
  1 Comment
Benjamin Kraus
Benjamin Kraus on 7 Feb 2023
Using patch as @Arif Hoq suggested is best, but you may also want to set the FaceAlpha and EdgeColor like this:
x=[1:10];
y=[1:10];
figure(1);clf;
plot(x,y,'b')
hold on
plot([1,10],2*[1,1],'--.k')
hold on
plot([1,10],4*[1,1],'--.k')
x = [1 10 10 1];
y = [2 2 4 4];
patch(x,y,'k','FaceAlpha',0.5,'EdgeColor','none')
xlim([1 10])

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Sarvesh Kale
Sarvesh Kale on 7 Feb 2023
Hi ,
You can add the following extra line to your code
rectangle("Position",[1 2 10 2],"FaceColor",[150/255 150/255 150/255],"LineStyle","none");
This will shade the required portion with gray color, However I was not able to toggle its visibility so that the underlying slanted straight line is also visible.

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