How to plot spatial data

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Matteo Monzali
Matteo Monzali 2022-9-19
回答： Benjamin Kraus 2022-9-19
Hi, I would like to plot some spatial data.
In particular, I have three variables,
lat 81x1 single
lon 241x1 single
u 241x81 double
I have another code from a uni course, but the variable dimension where different. So I tried to change it and obtained the code reported.
fig2=figure('units','normalized','outerposition',[0.5 0.5 0.4 0.55]);
hold on
worldmap([double(min(lat)) double(max(lat))], [double(min(lon)) double(max(lon))]);
plot(lat,lon, u)
But I get the error:
Error using plot Vectors must be the same length.
Error in ERA5 (line 22) plot(lat,lon, u)
Could you help me please? Thank you!

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回答（1 个）

Benjamin Kraus
Benjamin Kraus 2022-9-19
As the error says, lat and lon need to be the same size.
Based on the shape of your variables, I suspect you need to use meshgrid to convert your variables from vectors to matrices. Something like this:
[LAT, LON] = meshgrid(lat, lon);
plot(LAT(:), LON(:), u(:))

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