将Matlab颜色绘制为垂直条 [英] Plot Matlab colours as vertical bars

问题描述

我偶然发现这

解决方案

一个相当简单的方法如下：

  a = [0 0 1.0000; 
 1.0000 0 0; 
 0 1.0000 0; 
 0 0 0.1724; 
 1.0000 0.1034 0.7241; 
 1.0000 0.8276 0; 
 0 0.3448 0] 
 
 figure 
 imagesc（1：size（a，1））; 
 colormap（a）; 
％可选，但整理了一点
 set（gca，'clim'，[0.5（size（a，1）+ 0.5）]）; 
 
％也是可选的，删除轴上的标记
 set（gca，'xtick'，[]，'ytick'，[]）; 
  

输出：

I stumbled upon this file exchange submission, which, given a positive integer, generates that many "maximally distinguishable" colours. The tool is working great, but I would like to visualize the colours it generates with coloured vertical bands. An example, taken from the linked blog article:

For the choice of colours:

ans =
         0         0    1.0000
    1.0000         0         0
         0    1.0000         0
         0         0    0.1724
    1.0000    0.1034    0.7241
    1.0000    0.8276         0
         0    0.3448         0

We obtain the vertical bands on the left that show these colours.

解决方案

A fairly simple way would be as follows:

a = [     0         0    1.0000 ;
     1.0000         0         0 ;
          0    1.0000         0 ;
          0         0    0.1724 ;
     1.0000    0.1034    0.7241 ;
     1.0000    0.8276         0 ;
          0    0.3448         0 ]

figure
imagesc(1:size(a, 1));
colormap(a);
% Optional, but neatens things up a bit
set(gca, 'clim', [0.5 (size(a, 1) + 0.5)]);

% Also optional, removes the ticks from the axes
set(gca, 'xtick', [], 'ytick', []);

output:

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