Creating a scatter plot with three variables.
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Hello, I am trying to create a scatter plot of some rain gauge data. I have three columns with data in them. My X variable is for Longitude, Y is Latitude and Z would be the rainfall totals. Each variable is a 31x1 double array. How can I get the Z variable to show up as individual points on the graph with color representing higher values?
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Star Strider
2018-6-5
This uses the value of ‘Z’ to scale the colors:
x = 1:20;
y = 1:20;
[X,Y] = ndgrid(x,y); % Create Grids
Z = (X - 10).*(Y - 10); % Create ‘Z’
figure
scatter3(X(:), Y(:), Z(:), [], Z(:), 'filled') % Use ‘Z(:)’ To Scale Colors
Experiment to get the result you want with your data.
6 个评论
Brandon Bush
2018-6-5
Star Strider
2018-6-5
Try this:
x = 1:20;
y = 1:20;
[X,Y] = ndgrid(x,y); % Create Grids
Z = (X - 10).*(Y - 10); % Create ‘Z’
figure
scatter(X(:), Y(:), [], Z(:), 'filled')
That should do what you want.
Brandon Bush
2018-6-5
Star Strider
2018-6-5
My pleasure.
If my Answer helped solve your problem, please Accept it!
María Verónica Alba Valencia
2020-4-15
Thak you, too.
Star Strider
2020-4-15
My pleasure!
更多回答（1 个）
Honglei Chen
2018-6-5
I would use scatterm, something like
scatterm(X,Y,5,Z)
The reference page can be found at
HTH
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