How to Fit Tabular Data
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I have a table with two variables, x and y. For each x,y pair there is a z.
I'm trying to find a two variable function that can represent this table. I have been trying to use fit() but it says that the format of my vectors is off. So I did the example and looked at the three vectors loaded in.
load franke;
surffit = fit([x,y],z,'poly23','normalize','on')
I find that the vectors , x, y, and z are all the same dimension. However, in my mind z = f(x,y) should be a matrix of values with dimensions size(x) by size(y). What is this fit function actually fitting then?
답변 (1개)
Nitin Kapgate
2021년 2월 9일
'z' vector should be of the same size as 'x' and 'y' vectors. The fit function tries to approximately fit a curve or surface to the data using different fitting techniques (fit type) etc.
You can refer to this example that demonstrates how to fit a surface using variables in a MATLAB Table.
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