Problem with patch function
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Oliver Billson
el 22 de Jun. de 2021
Comentada: Oliver Billson
el 23 de Jun. de 2021
Hi,
I seem to be running into a common issue with the patch function but cant work out where i'm going wrong.
I want to simply fill the area between two lines, in this case, beach profiles. I've done this succesfully for my other beaches but seem to have issues with the one I've shared. Data and faulty figure attached.
Thanks in advance!
Oli
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Star Strider
el 23 de Jun. de 2021
I am not certain what you want.
Try this —
DL = load('XZ.mat');
X = DL.X;
Z = DL.Z;
figure
plot(X(1,:), Z(1,:))
hold on
plot(X(2,:), Z(2,:))
patch([X(1,:) fliplr(X(2,:))], [Z(1,:) fliplr(Z(2,:))], 'b', 'FaceAlpha',0.5)
hold off
producing:
I took a wild guess that ‘X(1,:)’ and ‘Z(1,:)’ went together, and ‘X(2,:)’ and ‘Z(2,:)’ did as well. Then the patch call that flips the second vector in each argument (that usually appears to work) created this plot. I only saw two vectors, so no third vector for the ‘mean profile’. I have no idea if that’s supposed to be supplied or is to be calculated (or how to calculate it) from the existing vectors.
.
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Walter Roberson
el 23 de Jun. de 2021
It is not clear what result you would expect when the data overlaps and one of them has a "twist" ?
load('XZ.mat')
fill(X(1,:),Z(1,:), 'r', 'facealpha', 0.5)
hold on
fill(X(2,:),Z(2,:), 'b', 'facealpha', 0.5)
hold off
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