Update multiple plot fills using XData and YData
27 views (last 30 days)
Show older comments
I was doing the following to generate n filled areas on a graph between n pairs of upper and lower curves.
for i = 1:n
x = % x values, function of i
y1 = % upper curve, function of i
y2 = % lower curve, function i
fill([x fliplr(x)], [y2 fliplr(y1)]);
hold on
end
However, I need to be able to plot an empty fill, and then add the fills in a loop using XData and YData, like this (I know the following won't work, but schematically)
h = fill(nan, nan, 'r');
for i = 1:n
x = % x values, function of i
y1 = % upper curve, function of i
y2 = % lower curve, function i
h(i).XData = [x fliplr(x)]
h(i).YData = [y2 fliplr(y1)]
end
What's the proper way to do this? My need for this stems from using scrollplots, which doesn't work well with re-plotting the data, but instead you need to update the data of the existing plot if changes are made. Any ideas?
1 Comment
Jan
on 29 Jan 2018
It is not clear, what you want to do. What is "an empty fill"? "Doesn't work well" is no clear description of the problem you have.
Answers (1)
Jan
on 29 Jan 2018
Edited: Jan
on 29 Jan 2018
[EDITED] Sorry, I've posted some nonsense code here by accident. Thanks, Walter. I do not remove the answer to keep the valuable comments.
8 Comments
Walter Roberson
on 30 Jan 2018
p3(1, 1:3) = fill(nan, nan, 'r') would assign the same patch handle to those elements.
The easiest fix is to loop. But you could use an implicit loop such as
arrayfun(@(~) fill(nan,nan), 1:3)
See Also
Categories
Find more on Graphics Object Programming in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!