How do I plot three variables against each other?
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I have a list of lightning flahses, each flash has a latitude, longitude, and a power. All three of these are lists, not matrices.
I would like to plot a 3D plot, where x is longitude, y is latitude, and each dot is color coded to represent its power at the latitude and longitudinal locations.
How do I do this using three lists? The 3d plotting functions, like imagesc, require a matrix as the third value.
Thanks!
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Star Strider
2019-6-28
Try this:
lat = rand(10,1); % Create Vector
lon = rand(10,1); % Create Vector
power = randi(9,10,1); % Create Vector
figure
scatter3(lat(:), lon(:), power(:), [], power(:), 'filled')
grid on
This will colour them by the ’Z’ (’power’) value. The fourth argument [] is the size reference, and since you may want them all the same size, that argument is the empty array.
6 个评论
Sophia Salazar
2019-6-28
Star Strider
2019-6-28
It works with simulated data in R2019a.
I would have to see at least a representative sample of your data to see what the problem is.
What version of MATLAB are you using?
Sophia Salazar
2019-6-28
Star Strider
2019-6-28
I tried my code with vectors of your size data, and even using randn for the ‘power’ vector to see if negative values could be the problem. It worked (including the colour mapping) with all of those, and ran without error.
Something is wrong somewhere, and it seems to be with your variables.
Run the whos function with your variables, and post back the result:
whos('lat','lon','power')
This is just an example, use the variable names you are using in your code.
It is also possible that you are not using the latest MATLAB updates. See: 2018b Update 3 for the update procedure.
Sophia Salazar
2019-6-28
Star Strider
2019-6-28
I have no idea what the problem could be.
I would need at least a representative sample of your data to see what the problem is (assuming I could reproduce it).
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