How to make a scatter plot of a 2D field in a map and add contour lines of a different field in the same map, without the contour command messing up with the color scale of the scatter command?

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Afonso Paiva 2019-9-21

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https://ww2.mathworks.cn/matlabcentral/answers/481459-how-to-make-a-scatter-plot-of-a-2d-field-in-a-map-and-add-contour-lines-of-a-different-field-in-the

回答： darova 2019-9-21

Say T is a vector with temperatures at specific longitudes(lon) and latitutes (lat) in a certain area.

Batim is a 2D depth field for the same area - say batim(i,j).

The command scatter(lon,lat,50,T,'filled') works fine, and shows dots with different colors (different temperatures) distributed in the domain. But if I add contour(i,j,batim,[100 1000])) or contour(i,j,batim,[100 1000]),'k'), then the T dots will be plot all with the same color.

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darova 2019-9-21

Please attach some data and your code

Afonso Paiva 2019-9-21

The code and data files are too big to include here. The following short code gives the same results, whether you comment or uncomment the contour command:

for n=1:10; batim(n,1:5)=n*100; end

figure(1), hold on, axis([1 5 1 10])

contour(batim,'k')

t = [ 3 2 20

4 4 25

2 8 17 ];

scatter(t(:,1),t(:,2),400,t(:,3),'filled')

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