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Contour Plot for Scattered Data

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Triangular Contour Plot



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TRICONTOUR(TRI,X,Y,Z,N) draws scalar N contour lines treating the values in Z as heights above a plane. TRI,X,Y,and Z define a triangulation where the triangles are defined by the M-by-3 face matrix TRI, such as that returned by DELAUNAY. Each row of TRI contains indices into the X,Y, and Z vertex vectors to define a single triangular face. Contours are computed directly from the triangulation rather than interpolating back to a cartesian grid using GRIDDATA.
TRICONTOUR(TRI,X,Y,Z,V) draws length(V) contour lines at the values specified in vector V.
TRICONTOUR(TRI,X,Y,Z,[v v]) draws a single contour line at the level v.
[C,H] = TRICONTOUR(...) returns contour matrix C as described in CONTOURC and a vector of handles H to the created patch objects.
H can be used to set patch properties.
CLABEL(C) or CLABEL(C,H) labels the contour levels.

Comments and Ratings (7)


Hi. Great function!
How do i turn on the option to fill the contours? I'm only getting the isolines.



Very useful, Thank you!

It is a pity MATLAB doesn't have a function like that yet. I usually avoid using functions from fileexchange but this one was really necessary for me. Smart way of leaving the option to insert the values for the contours, as I have a figure from parts so I can fix the values and keep the contours continuous


Useful function in order to display contour lines from a TIN (equivalent to a Delaunay triangulation) without converting the TIN into a regular mesh.

Rick van Rijn


Jon (view profile)

Exactly what I was looking for.

MATLAB Release
MATLAB 7 (R14)

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