How to plot a map over plotm

Hi, I have a 360*720 matric which includes the value of the temperature of the globe with the spatial resolution of 0.5 degree. I would like to plot this metric as a map after I used the following code;

figure;
worldmap world
load coastlines
plotm(coastlat, coastlon)

Thanks in advace.

[Sreeraj T]

I am not sure whether you are following this thread anymore. I do not see any MWE. But I guess that instead of 'plotm', the command 'surfm' would be useful.

Answer 1

[Greg]

Hi Peyman, Thank you for your question. The latitude and longitude vectors must match the actual center coordinates of the matrix cells. If the first row of your matrix T represents southernmost latitudes, reverse the latitude vector or use flipud(T). pcolorm creates the temperature map, and plotm overlays the coastlines.

% Specify your matrix T as the 360-by-720 temperature matrix
lat = 89.75:-0.5:-89.75;       % adjust to your data orientation
lon = -179.75:0.5:179.75;

figure
worldmap("World")

pcolorm(lat, lon, T)
shading flat
colorbar
colormap parula

load coastlines
plotm(coastlat, coastlon, "k", "LineWidth", 0.5)

Thank you, Greg