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Contour Plot for Scattered Data

version 1.0.0.0 (3.78 KB) by Duane Hanselman
Triangular Contour Plot

42 Downloads

Updated 31 Oct 2012

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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.

Cite As

Duane Hanselman (2020). Contour Plot for Scattered Data (https://www.mathworks.com/matlabcentral/fileexchange/38858-contour-plot-for-scattered-data), MATLAB Central File Exchange. Retrieved .

Comments and Ratings (14)

Gabriel Barros

Josh Philipson

Thank you, Duane!!

REDI PONI

hi,
did anyone find a fix for :
\\\\\
hi,

do you know why clabel(c,h) does not work?

Error using clabel (line 77)
Not enough contour handles.

Thanks
\\\\\

?

NP

Hello,
Your examples do not work for me. I get the error message "xxx dodgy iterations". Any idea of what could be happening?
Thanks

Tianshu Yu

wave_buoys

hi,

do you know why clabel(c,h) does not work?

Error using clabel (line 77)
Not enough contour handles.

Thanks

youssef aider

Mechrod

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

Thanks!

tarekawadalla

Very useful, Thank you!

Mitrofan Curti

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

gioxi84

Ludger Suarez-Burgoa

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

Exactly what I was looking for.

MATLAB Release Compatibility
Created with R14
Compatible with any release
Platform Compatibility
Windows macOS Linux

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