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How to plot non-square 3 dimensional matrix?

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Tyler Paladino
Tyler Paladino on 28 Sep 2020 at 20:46
Commented: Tyler Paladino on 29 Sep 2020 at 15:38
Hi all,
I have some climate data that I'm having a hard time visualzing in MATLAB. I have 3D temperature matrix with dimensions of 65x49x20. I also have vectors of latitude(49x1), longitude (65x1), and altitude (20x1). I've tried creating a meshgrid out of lat, lon, and altitude, and then scatter3/surf/mesh the meshgrid with the 3D temperature data (e.g. scatter3(xmg,ymg,zmg,T)), but keep running into errors about vectors not being the same length. But everything is the same size! the temp matrix as well as the meshgrid I've created all have the same dimensions, yet I can't seem to be able to plot anything. Anyone have ideas of what I'm doing wrong?


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Accepted Answer

Walter Roberson
Walter Roberson on 29 Sep 2020 at 1:46
%create some data for demonstration
lat = sort(rand(49,1))*180-90;
long = sort(rand(65,1))*360-180;
alt = sort(rand(20,1))*20000;
[latG, longG, altG] = meshgrid(lat, long, alt);
temperature = sort(rand(65,49,20) * 100-50, 3, 'descend');
%now the graphic
pointsize = 20;
scatter3(latG(:), longG(:), altG(:), pointsize, temperature(:))
The pointsize is what you missed.
Note that in this, the temperature will not be shown directly, and will instead be encoded as color information.
Alternate graphic:
volshow(temperature, 'colormap', jet);

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Tyler Paladino
Tyler Paladino on 29 Sep 2020 at 15:38
Ahh I see. I also forgot to select the whole array (:) in my scatter command. Thanks for your help!

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