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

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')

[Levente Gellért]

Dear Community members! How can one solve the same problem in 2017a?

Thanks

lg

[Star Strider]

My code should work equally well in R2017a.

Answer 1

[Star Strider]

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.

.

[Abhik Saha]

Thank you it works!

[Star Strider]

As always, my pleasure!

[Afiq Azaibi]

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'.

Answer 2

[Arif Hoq]

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])

[Benjamin Kraus]

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])

Answer 3

[Sarvesh Kale]

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.