Spatial plot land part in gray color

Joydeb Saha

2025 1 21

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I am plotting a spatial plot, I want land parts should be in gray or white colour. The code I am attaching is not working

figure;
imagesc(lon, lat, corr_coeff_weak'); 
set(gca, 'YDir', 'normal'); 
colorbar;
colormap(redblue); 
caxis([-1 1]); 
xlabel('Longitude');
ylabel('Latitude');
title('Correlation for Weak SST Years');
hold on;
load coastlines;
fill(wrapTo360(coastlon), coastlat, 'w', 'EdgeColor', 'none'); % Fill land with white
plot(wrapTo360(coastlon), coastlat, 'k.', 'MarkerSize', 4); 
axis xy;

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Mathieu NOE 2025-1-21

hello

can you provide corr_coeff_weak data ?

Austin M. Weber 2025-1-21

在 MATLAB Online 中打开

Have you tried plotting your data using a map axes instead? With the axesm function you can specify to plot longitudes from 0 to 360 instead of -180 to +180. For example:

load coastlines

figure;

axesm('Robinson','MapLonLimit',[0 360])

fillm(coastlat,coastlon,'FaceColor','#505050','EdgeColor','none')

framem

gridm

box off

set(gca,'YColor','none','XColor','none')