How to discretize the color in contour bar at smallest possible range?
31 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
I am trying to put the different color at smallest ranges like 0.0005-0.005, 0.005-0.009, 0.01-0.05, 0.05-0.1, 0.1-0.25, 0.25-0.5, 0.5-0.75, 0.75-1, 1-1.5, 1.5-2, 2-2.5, 2.5-3. Now, I get the plot in which fill the same color in range between 0-0.5 but I want to decrease the range 0-0.0001 in which only one color fill then it will change for other range like 0.0001-0.005. how to do it?
I write the code in given below. Thank you
contourf(X,Y,Z)
cmap = jet(200);
set(gca, 'Colormap',cmap)
cb = colorbar();
caxis([0,3])
set(cb, 'Ticks', 0:0.25:3)
ylabel(cb, 'Att rate')
0 Kommentare
Antworten (2)
KSSV
am 3 Feb. 2023
% Make data for demo
[X,Y,Z] = peaks ;
vals = [0.000 0.005;
0.005 0.009 ;
0.01 0.05 ;
0.05 0.1;
0.1 0.25;
0.25 0.5 ;
0.5 0.75 ;
0.75 1 ;
1 1.5 ;
1.5 2 ;
2 2.5 ;
2.5 3] ;
% As Z is in different range get it into range [0 3] here
Z = (3-0)*(Z-min(Z(:)))./(max(Z(:))-min(Z(:)))+0 ;
Z0 = Z ;
% Change the values in Z according to color
for i = 1:size(vals,1)
idx = Z0 >= vals(i,1) & Z0 < vals(i,2) ;
Z(idx) = vals(i,2) ;
end
contourf(X,Y,Z0)
cmap = jet(size(vals,1));
set(gca, 'Colormap',cmap)
cb = colorbar();
set(cb, 'Ticks', 0:0.25:3)
ylabel(cb, 'Att rate')
1 Kommentar
DGM
am 3 Feb. 2023
Inspection shows that the plot colors don't visually correspond to the intervals shown on the colorbar, as there are 7 levels in the plot, but 12 intervals on the colorbar.
DGM
am 3 Feb. 2023
Since you didn't specify the levels or even the number of levels in the call to contourf(), there is no reason to suspect that they occur at particular points on some quasi-log scale. Otherwise, the colorbar would be nothing but misleading. You'll have to specify your levels in the call to contourf(), specify an appropriate-length colormap, and set the colorbar ticks accordingly.
See this example:
0 Kommentare
Siehe auch
Kategorien
Mehr zu Purple finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!