How to change the colour of the markers on a scattered graph?

Question

Hyeonjun Park 2021-7-13

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/877698-how-to-change-the-colour-of-the-markers-on-a-scattered-graph

评论： Star Strider 2021-7-15

采纳的回答： Star Strider

raw_w14_scans.mat

在 MATLAB Online 中打开

Hi all,

I have a data set which is 5 * 1 double (BMC_14_whole_sum) which is like 8.5, 8.8, 9.3 etc and I am plotting that in a boxplot and scatter graph to show where exactly the markers are. Below is what I have tried so far:

BMC_14_whole_sum = sum(BMC_14_whole,2);
boxplot(BMC_14_whole_sum)
hold on
scatter(ones(size(BMC_14_whole_sum)).*(1+(rand(size(BMC_14_whole_sum))-0.5)/10),BMC_14_whole_sum, 'filled')
hold off
title('BMC Whole W14')

I have attached my .mat file. The image above is something similar to what I get. I would like to have those 5 different markers to have 5 different colours and possibly 5 different marker styles as well. How can I do that? Also, if there is a simpler codes to plot the scatter graph rather than using (ones(size(BMC_14_whole_sum)).*(1+(rand(size(BMC_14_whole_sum))-0.5)/10),BMC_14_whole_sum), please suggest me too.

Thank you so much for the help

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Answer 1

Star Strider 2021-7-14

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https://ww2.mathworks.cn/matlabcentral/answers/877698-how-to-change-the-colour-of-the-markers-on-a-scattered-graph#answer_746838

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Try this —

LD = load('aw_w14_scans.mat');
BMC_14_whole = LD.BMC_14_whole;
BMC_14_whole_sum = sum(BMC_14_whole,2);
boxplot(BMC_14_whole_sum)
hold on
scatter(ones(size(BMC_14_whole_sum)).*(1+(rand(size(BMC_14_whole_sum))-0.5)/10),BMC_14_whole_sum, [], (1:numel(BMC_14_whole_sum)), 'filled')
colormap(jet)
hold off
title('BMC Whole W14')

The colours are defined here by ‘(1:numel(BMC_14_whole_sum))’. Choose whatever colormap you want.

There is nothing similar to colororder for markers, so changing the markers would require a loop.

mv = 'psdo^';
cm = colormap(jet(numel(BMC_14_whole_sum)))
xv = ones(size(BMC_14_whole_sum)).*(1+(rand(size(BMC_14_whole_sum))-0.5)/10);
yv = BMC_14_whole_sum;
figure
boxplot(BMC_14_whole_sum)
hold on
for k = (1:numel(BMC_14_whole_sum))
    scatter(xv(k), yv(k), [], cm(k,:), 'filled', 'Marker',mv(k))
end
hold off
title('BMC Whole W14')

.

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Hyeonjun Park 2021-7-15

oh alright thank you!

Star Strider 2021-7-15

As always, my pleasure!

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Answer 2

ANKUR KUMAR 2021-7-13

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/877698-how-to-change-the-colour-of-the-markers-on-a-scattered-graph#answer_746023

在 MATLAB Online 中打开

I don't think I understood your question completely. Please do attach sample data (probably in a .mat file) and your complete code. But I picked a line, and trying to answer that.

Answering this question:

" I can't seem to find a way. I would like to have 5 different markers to have 5 different colours. How can I do that?"

x = linspace(0,1*pi,200);

y = cos(x) + rand(1,200);

cols={'r','b','g','m','k'}; % If you want random colors, you can just simply generate RGB random numbers using randi commmand

markers={'d','o','+','^','*'};

for index=1:5

scatter(x,sin(x*index),cols{index},markers{index})

hold on

end

legend(strcat('Sin ',{' '},string([1:5]),'x'),'box','off','location','best')