Problem with patch function

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

Answer 1

[Star Strider]

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.

.

Answer 2

[Walter Roberson]

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

[Oliver Billson]

Sorry, my question was not particularly clear. Star Strider guessed right and using their code, this is what I produced: