带有彩色组和组内不同标记的散点图 [英] Scatter plot with coloured groups and different markers within a group

问题描述

我正在尝试制作一个由不同群体组成的散点图.除此之外，我还要为每2个点设置2个不同的标记和一种颜色，这些标记也与一条线相连.但详情请参见下文

I am trying to make kind of a scatter plot with different groups. In addition to this I would like to have 2 different markers and one color for each set of 2 points, which are also connected with a line. But see below for details

我有4个矩阵

Db = [0.4745 0.3886 0.3316 0.2742; 0.5195 0.3825 0.3341 0.2846; 0.4929 0.3951 0.3161 0.2918; 0.4905 0.4052 0.3240 0.2882];
Dw = [0.4814 0.3905 0.3418 0.2922; 0.5258 0.3952 0.3420 0.2974; 0.4945 0.4012 0.3386 0.3001; 0.4885 0.4076 0.3382 0.3056];
Sb = [0.0476 0.0527 0.0543 0.0592; 0.0432 0.0503 0.0521 0.0592; 0.0460 0.0531 0.0536 0.0508; 0.0488 0.0520 0.0542 0.0543];
Sw = [0.0693 0.0738 0.0785 0.0839; 0.0642 0.0731 0.0763 0.0862; 0.0670 0.0755 0.0807 0.0753; 0.0744 0.0733 0.0792 0.0776];

我想将它们绘制为散点图，其中Sb针对Db，Sw针对Dw.但是现在我希望它们具有不同的标记，以便Sb/Db点具有'x'，而Sw/Dw点具有'o'.

I would like to plot them as a scatter plot with Sb against Db and Sw against Dw. But now I would like them to have different markers so that the Sb/Db points have an 'x' and Sw/Dw points have an 'o'.

然后我还想用一条线连接它们，例如，Sb/Db的第一个元素应该与Sw/Dw的第一个元素连接.

Then additionally I want to connect them with a line, so for example the first element of Sb/Db should be connected with the first element of Sw/Dw.

这样的事情(在此示例的图形编辑器中进行了编辑...)

Something like this (edited in a graphics editor for this example...)

我已经尝试过gscatter

gscatter([Db(:)' Dw(:)'],[Sb(:)' Sw(:)'],[1:16 1:16])

但是，我不知道如何更改标记或添加行.

But with this I don't know how to change the markers or add lines.

有人可以帮我吗?

推荐答案

您可以通过两次调用scatter和一次调用line来实现.

You can do this with a couple of calls to scatter and one call to line.

% Turn your data into 1D row vectors
vDb = Db(:).'; vDw = Dw(:).'; vSb = Sb(:).'; vSw = Sw(:).';
% Plotting
figure; hold on
% Scatters for points
scatter(vDb, vSb, 'kx'); % plotting with black (k) crosses (x)
scatter(vDw, vSw, 'ko'); % plotting with black (k) circles (o)
% Line to get lines!
line([vDb; vDw], [vSb; vSw], 'color', 'k') % Plot black (k) lines between 'b' and 'w' pts 

输出:

通过使用多次调用line而不是使用scatter，为两个调用指定标记，但仅使用起点/终点，用NaN替换另一个，您可以使每对颜色不同

You can get different colours per pair by just using multiple calls to line instead of using scatter, specifying the markers for two of the calls but only using the start/end points, replacing the other with NaN.

% No need for 'hold on' as line doesn't clear the plot!
figure;
line([vDb; NaN.*vDw], [vSb; NaN.*vSw], 'marker', 'x') % Plot coloured x markers
line([NaN.*vDb; vDw], [NaN.*vSb; vSw], 'marker', 'o') % Plot coloured o markers
line([vDb; vDw], [vSb; vSw]) % Plot coloured lines between 'b' and 'w' pts

输出:

请注意，这使用默认的颜色集.可以使用

Note that this uses the default colour set. This can be changed by using

set(gca, 'colororder', mycolours)

其中mycolours是3列RGB矩阵，如使用get(gca, 'colororder')所示.

where mycolours is a 3 column RGB matrix, as seen if you use get(gca, 'colororder').

这篇关于带有彩色组和组内不同标记的散点图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！