How do you remove non-integer values from a colorbar?
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My image only has integer values, so including the non-integer values in the colorbar is something I'd like to not do.
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Kevin Holly
le 15 Sep 2022
Let's say this is an image with a colorbar with non-integer values:
Img = randi(255,25);
imagesc(Img)
h=colorbar;
h.Ticks = [25:55.5:250];
You can change the Ticks with the handle as such:
Img = randi(255,25);
imagesc(Img)
h=colorbar;
h.Ticks = [25:25:250];
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Kevin Holly
le 15 Sep 2022
Modifié(e) : Kevin Holly
le 15 Sep 2022
You can change your colormap
Img = randi(4,25)-2;
imagesc(Img)
cmap = [0 0 1; 0 1 0; 1 1 1; 1 0 0];
colormap(cmap)
h=colorbar;
h.Ticks=-1:2;
Knowing I have 3 sections, I will change my colormap to only have 3 colors.
imagesc(Img)
cmap = [0 0 1; 1 1 1; 1 0 0];
colormap(cmap)
h=colorbar;
h.Ticks=-1:2;
Star Strider
le 15 Sep 2022
This required some coding gymnastics, however it may be what you want —
cm = [1 0 0; 1 1 1; 0 0 1]; % Basic Colormap
cmi = interp1([-1; 0; 2], cm, (-1:2)) % interpolated Colormap
M = randi([-1 2],9) % Matrix
figure
imagesc(M)
colormap(cmi)
hcb = colorbar;
xt = hcb.Ticks;
tix = linspace(min(xt), max(xt), size(cmi,1)*2+1);
hcb.Ticks = tix;
hcb.TickLabels = cell(1,numel(tix));
hcb.TickLabels(2:2:numel(hcb.Ticks)) = compose('%2d',min(xt):max(xt));
hcb.TickLength = 0; % Set TickLength' To 0
.
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