Triangular plot, Plotting, MATLAB, Ternary plot, color plot, Contour map
40 views (last 30 days)
Show older comments
Still no one could help me with this question. I have a .csv file with 3 columns of different range of data. Each column contains 500,000 rows including some duplicate numbers. I am trying to plot a color plot like the one I attached here. A triangular color plot, like conotur map.
1 Comment
Onkar Khadke
on 26 Aug 2021
Hello Farshad,
I am too looking for getting a triangular plot. Did you made any more progress on that, if so then kindly share the script for my reference. Your help is appreciated Thank you
Answers (2)
KSSV
on 20 Oct 2020
Let A be your m*3 column array. Try this:
x = A(:,1) ; y = A(:,2) ; z = A(:,3) ;
%%structured
xi = unique(x) ; yi = unique(y) ;
[X,Y] = meshgrid(xi,yi) ;
Z = reshape(z,size(X)) ;
figure
surf(X,Y,Z)
%%unstructured
dt = delaunayTriangulation(x,y) ;
tri = dt.ConnectivityList ;
figure
trisurf(tri,x,y,z)
%% USe Interpoaltion
m = 100 ; n = 100 ;
xi = linspace(min(x),max(x),m) ;
yi = linspace(min(y),max(y),n) ;
[X,Y] = meshgrid(xi,yi) ;
Z = griddata(x,y,z,X,Y) ;
pcolor(X,Y,Z)
shading interp
colorbar
6 Comments
KSSV
on 20 Oct 2020
If you know the triangular dimension.......make the vertices....use inpolygon and pick only the points inside this triangle and plot.
See Also
Categories
Find more on Surface and Mesh Plots in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!