How can I produce different colours for different clusters?

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Abdulatif Alabdulatif 2016-5-16

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评论： Walter Roberson 2016-5-18

采纳的回答： Walter Roberson

Hi,

I have the following dataset --> three columns (x,y, class of the data point(0,1,2,3 or 4)).

(-9.69171, -8.86384, 0)

(-9.55902, -8.10946, 0)

(-1.73544, -7.12043, 1)

(-1.77755, -6.39318, 1)

(-3.79288, -5.00445, 2)

(-3.36182, -6.39692, 2)

(-1.46405, -1.70081, 3)

(-0.413965, -2.22041, 3)

(-9.59192, -8.78982, 4)

(-9.72115, -8.37142, 4)

(This is just a sample dataset)

How can I plot that dataset where each data point has the same colour of its label. (The data is labelled in four groups).

Thank you

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采纳的回答

Walter Roberson 2016-5-16

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/284365-how-can-i-produce-different-colours-for-different-clusters#answer_222268

在 MATLAB Online 中打开

pointsize = 30;
scatter(x(:), y(:), pointsize, group_number+1);
colormap(jet(5))

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Abdulatif Alabdulatif 2016-5-17

编辑：Abdulatif Alabdulatif 2016-5-17

Great!

1- How can I plot from 1 to 100 in separate scatter with a specific symbol?

Thanks

Walter Roberson 2016-5-18

在 MATLAB Online 中打开

symbols = {'*', '+', '.', 'v', 'p'};
for idx = 1 : length(symbols)
  mask = group_number == idx;
  scatter(x(mask), y(mask), pointsize, 'Marker', symbols{idx});
  hold on
end

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