How can I draw points with 3 column data

Question

Dung Nguyen 2023-3-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1933185-how-can-i-draw-points-with-3-column-data

评论： Cameron 2023-3-23

Dear friend

I have a data file with 3 columns as 1 column is longitude, 2 column is latitude and column 3 is values. I want to draw a figure which I attached. I tried with 'scatter' and 'pcolor' but I didn't succeed. I attached a figure as a example and a data file. I hope someone can help me.

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Answer 1

Cameron 2023-3-22

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https://ww2.mathworks.cn/matlabcentral/answers/1933185-how-can-i-draw-points-with-3-column-data#answer_1198795

在 MATLAB Online 中打开

You can adjust your plot as needed.

data = webread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1332705/tec.txt');
numericdata =  str2num(data);
longitude = numericdata(:,1);
latitude = numericdata(:,2);
color = numericdata(:,3);
geoscatter(latitude,longitude,color,color,'filled')
colormap('turbo')
colorbar

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Dung Nguyen 2023-3-23

error.png

Dear Cameron

Thanks for your replying. I run your code but it inform a error (I sent a figure in the attachements). I use matlab 2016a, It does not have 'geoscatter'. I coppy 'geoscatter' in another verision of matlab. Can you check to help me?

Cameron 2023-3-23

All of the geoaxes plots I'm aware of are only available in R2017b and later releases. If possible, I would try to update to a more recent version as there have been 14 major releases since R2016a.

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