如何设置颜色条标签 [英] How to set colorbar labels

问题描述

我在喷射"配色图中有几点.这些点的系数可以从0到1，但是通常它们不能覆盖所有范围，例如0.75-0.9.

I have some points in a 'jet' colormap. The points have a coefficient that can go from 0 to 1, but usually they dont cover all the range, e.g 0.75-0.9.

当我绘制这些点时，我会为其着色，因此0.75是颜色图中的次要颜色，而0.9是颜色图中的最大颜色，因此将显示所有颜色图.我想做的就是在颜色栏中也显示出来.当我绘制颜色条时，其上的标签会变为64，但是我希望它们的范围从0.75到0.9.我该怎么办?

When I plot those points I colour them so 0.75 is the lesser colour in the colormap and 0.9 is the maximum color in the colormap, so all the colormap is shown. What I want to do is show that in the colorbar also. When I plot the colorbar the labels on it go to 64, but I want them from 0.75 to 0.9. How can I do that?

编辑 我认为代码本身并没有多大帮助，但以防万一.在colors变量中，将ZNCC转换为颜色图的范围.

EDIT I don't think the code itself helps a lot but here it goes, just in case. In the colors variable I convert the ZNCC to the range of the colormap.

EDIT2

我找到了caxis对我不起作用的原因.这是代码:

I found the reason why caxis is not working for me. Here is the code:

%this is why it doesnt work
im=imread('someimageyouwanttotest_inRGB.png')
imshow(im)


points=[1, 2;1 , 2 ;0.3,0.7]
ZNCC=points(3,:)
cmap=colormap('jet');
colors=cmap(round(  ((1-min(ZNCC))+ZNCC-1).*(size(cmap,1)-1)/max((1-min(ZNCC))+ZNCC-1))+1,:  );
hold on
for i=1:length(ZNCC)

    plot(points(1,i),points(2,i),'.','Color',colors(i,:));  

end
colorbar()
hold off

推荐答案

我认为这是您的代码正确显示了所有颜色，然后只在没有图像的情况下首先设置了颜色栏:

I think that is your code displays all your colours correctly then rather just set up the colour bar first on no image:

points=[1, 2;1 , 2 ;0.3,0.7]
ZNCC=points(3,:)

cmap=colormap('jet');
caxis([min(ZNCC) max(ZNCC)]); 
colorbar();

hold on

%this is why it doesnt work
im=imread('someimageyouwanttotest_inRGB.png')
imshow(im)

colors=cmap(round(  ((1-min(ZNCC))+ZNCC-1).*(size(cmap,1)-1)/max((1-min(ZNCC))+ZNCC-1))+1,:  );

for i=1:length(ZNCC)

    plot(points(1,i),points(2,i),'.','Color',colors(i,:));  

end

hold off

我没有imshow:/

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