Inserting black lines on pcolor plot

Question

Charlie Milford 2022-9-4

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1794205-inserting-black-lines-on-pcolor-plot

评论： Charlie Milford 2022-9-4

采纳的回答： KSSV

I have a matrices of values which I want to use to create a pcolor plot.

My data is constrained by water depths where I have set all depth >100m to NaN and all values of 0 to NaN.

This has created a confusing plot where I'm unable to show coastal outlines properly.

How would I change this plot so that I retain my '0 depth' or land values but create a black outline that will clearly show the outline of the coasts.

Thanks.

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Answer 1

KSSV 2022-9-4

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https://ww2.mathworks.cn/matlabcentral/answers/1794205-inserting-black-lines-on-pcolor-plot#answer_1041325

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You can use contour.

Let X, Y, H be your data of (x,y) coordinates and H be your depth.

figure
hold on
pcolor(X,Y,H)
shading interp
contour(X,Y,H,[0 0],'k')

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Charlie Milford 2022-9-4

Thank you for your answer it works perfectly and will use in future. I ended up using the m_map addon and imported a coastal data zip file in the end.

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